@@ -184,5 +184,6 @@
eth@10002000 {
compatible = "sandbox,eth";
reg = <0x10002000 0x1000>;
+ fake-host-hwaddr = [00 00 66 44 22 00];
};
};
@@ -14,22 +14,128 @@
DECLARE_GLOBAL_DATA_PTR;
+/**
+ * struct eth_sandbox_priv - memory for sandbox mock driver
+ *
+ * fake_host_hwaddr: MAC address of mocked machine
+ * fake_host_ipaddr: IP address of mocked machine
+ * recv_packet_buffer: buffer of the packet returned as received
+ * recv_packet_length: length of the packet returned as received
+ */
+struct eth_sandbox_priv {
+ uchar fake_host_hwaddr[ARP_HLEN];
+ IPaddr_t fake_host_ipaddr;
+ uchar *recv_packet_buffer;
+ int recv_packet_length;
+};
+
static int sb_eth_start(struct udevice *dev)
{
+ struct eth_sandbox_priv *priv = dev_get_priv(dev);
+
debug("eth_sandbox: Start\n");
+ fdtdec_get_byte_array(gd->fdt_blob, dev->of_offset, "fake-host-hwaddr",
+ priv->fake_host_hwaddr, ARP_HLEN);
+ priv->recv_packet_buffer = net_rx_packets[0];
return 0;
}
static int sb_eth_send(struct udevice *dev, void *packet, int length)
{
+ struct eth_sandbox_priv *priv = dev_get_priv(dev);
+ struct ethernet_hdr *eth = packet;
+
debug("eth_sandbox: Send packet %d\n", length);
+ if (ntohs(eth->et_protlen) == PROT_ARP) {
+ struct arp_hdr *arp = packet + ETHER_HDR_SIZE;
+
+ if (ntohs(arp->ar_op) == ARPOP_REQUEST) {
+ struct ethernet_hdr *eth_recv;
+ struct arp_hdr *arp_recv;
+
+ /* store this as the assumed IP of the fake host */
+ priv->fake_host_ipaddr = NetReadIP(&arp->ar_tpa);
+ /* Formulate a fake response */
+ eth_recv = (void *)priv->recv_packet_buffer;
+ memcpy(eth_recv->et_dest, eth->et_src, ARP_HLEN);
+ memcpy(eth_recv->et_src, priv->fake_host_hwaddr,
+ ARP_HLEN);
+ eth_recv->et_protlen = htons(PROT_ARP);
+
+ arp_recv = (void *)priv->recv_packet_buffer +
+ ETHER_HDR_SIZE;
+ arp_recv->ar_hrd = htons(ARP_ETHER);
+ arp_recv->ar_pro = htons(PROT_IP);
+ arp_recv->ar_hln = ARP_HLEN;
+ arp_recv->ar_pln = ARP_PLEN;
+ arp_recv->ar_op = htons(ARPOP_REPLY);
+ memcpy(&arp_recv->ar_sha, priv->fake_host_hwaddr,
+ ARP_HLEN);
+ NetWriteIP(&arp_recv->ar_spa, priv->fake_host_ipaddr);
+ memcpy(&arp_recv->ar_tha, &arp->ar_sha, ARP_HLEN);
+ NetCopyIP(&arp_recv->ar_tpa, &arp->ar_spa);
+
+ priv->recv_packet_length = ETHER_HDR_SIZE +
+ ARP_HDR_SIZE;
+ }
+ } else if (ntohs(eth->et_protlen) == PROT_IP) {
+ struct ip_udp_hdr *ip = packet + ETHER_HDR_SIZE;
+
+ if (ip->ip_p == IPPROTO_ICMP) {
+ struct icmp_hdr *icmp = (struct icmp_hdr *)&ip->udp_src;
+
+ if (icmp->type == ICMP_ECHO_REQUEST) {
+ struct ethernet_hdr *eth_recv;
+ struct ip_udp_hdr *ipr;
+ struct icmp_hdr *icmpr;
+
+ /* reply to the ping */
+ memcpy(priv->recv_packet_buffer, packet,
+ length);
+ eth_recv = (void *)priv->recv_packet_buffer;
+ ipr = (void *)priv->recv_packet_buffer +
+ ETHER_HDR_SIZE;
+ icmpr = (struct icmp_hdr *)&ipr->udp_src;
+ memcpy(eth_recv->et_dest, eth->et_src,
+ ARP_HLEN);
+ memcpy(eth_recv->et_src, priv->fake_host_hwaddr,
+ ARP_HLEN);
+ ipr->ip_sum = 0;
+ ipr->ip_off = 0;
+ NetCopyIP((void *)&ipr->ip_dst, &ip->ip_src);
+ NetWriteIP((void *)&ipr->ip_src,
+ priv->fake_host_ipaddr);
+ ipr->ip_sum = compute_ip_checksum(ipr,
+ IP_HDR_SIZE);
+
+ icmpr->type = ICMP_ECHO_REPLY;
+ icmpr->checksum = 0;
+ icmpr->checksum = compute_ip_checksum(icmpr,
+ ICMP_HDR_SIZE);
+
+ priv->recv_packet_length = length;
+ }
+ }
+ }
+
return 0;
}
static int sb_eth_recv(struct udevice *dev, uchar **packetp)
{
+ struct eth_sandbox_priv *priv = dev_get_priv(dev);
+
+ if (priv->recv_packet_length) {
+ int lcl_recv_packet_length = priv->recv_packet_length;
+
+ debug("eth_sandbox: received packet %d\n",
+ priv->recv_packet_length);
+ priv->recv_packet_length = 0;
+ *packetp = priv->recv_packet_buffer;
+ return lcl_recv_packet_length;
+ }
return 0;
}
@@ -80,5 +186,6 @@ U_BOOT_DRIVER(eth_sandbox) = {
.ofdata_to_platdata = sb_eth_ofdata_to_platdata,
.remove = sb_eth_remove,
.ops = &sb_eth_ops,
+ .priv_auto_alloc_size = sizeof(struct eth_sandbox_priv),
.platdata_auto_alloc_size = sizeof(struct eth_pdata),
};
@@ -126,6 +126,7 @@
/* include default commands */
#include <config_cmd_default.h>
+#define CONFIG_CMD_PING
#define CONFIG_CMD_HASH
#define CONFIG_HASH_VERIFY