diff options
| -rw-r--r-- | arch/sandbox/dts/sandbox.dts | 1 | ||||
| -rw-r--r-- | drivers/net/sandbox.c | 107 | ||||
| -rw-r--r-- | include/configs/sandbox.h | 1 |
3 files changed, 109 insertions, 0 deletions
diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts index 0df7b40..f5e0517 100644 --- a/arch/sandbox/dts/sandbox.dts +++ b/arch/sandbox/dts/sandbox.dts @@ -204,5 +204,6 @@ eth@10002000 { compatible = "sandbox,eth"; reg = <0x10002000 0x1000>; + fake-host-hwaddr = [00 00 66 44 22 00]; }; }; diff --git a/drivers/net/sandbox.c b/drivers/net/sandbox.c index 522990d..cb69a95 100644 --- a/drivers/net/sandbox.c +++ b/drivers/net/sandbox.c @@ -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), }; diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h index 01c6f19..e225ce6 100644 --- a/include/configs/sandbox.h +++ b/include/configs/sandbox.h @@ -130,6 +130,7 @@ /* include default commands */ #include <config_cmd_default.h> +#define CONFIG_CMD_PING #define CONFIG_CMD_HASH #define CONFIG_HASH_VERIFY |