diff options
| -rw-r--r-- | arch/sandbox/Kconfig | 3 | ||||
| -rw-r--r-- | arch/sandbox/cpu/Makefile | 10 | ||||
| -rw-r--r-- | arch/sandbox/cpu/eth-raw-os.c | 140 | ||||
| -rw-r--r-- | arch/sandbox/dts/sandbox.dts | 6 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/eth-raw-os.h | 32 | ||||
| -rw-r--r-- | board/sandbox/README.sandbox | 52 | ||||
| -rw-r--r-- | drivers/net/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/net/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/sandbox-raw.c | 98 |
9 files changed, 352 insertions, 0 deletions
diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig index e7f55fa82a..52e59d29e8 100644 --- a/arch/sandbox/Kconfig +++ b/arch/sandbox/Kconfig @@ -50,4 +50,7 @@ config NETDEVICES config DM_ETH default y +config ETH_SANDBOX_RAW + default y + endmenu diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile index 7d4410c42a..1b42fee141 100644 --- a/arch/sandbox/cpu/Makefile +++ b/arch/sandbox/cpu/Makefile @@ -8,6 +8,7 @@ # obj-y := cpu.o os.o start.o state.o +obj-$(CONFIG_ETH_SANDBOX_RAW) += eth-raw-os.o obj-$(CONFIG_SANDBOX_SDL) += sdl.o # os.c is build in the system environment, so needs standard includes @@ -20,3 +21,12 @@ $(obj)/os.o: $(src)/os.c FORCE $(call if_changed_dep,cc_os.o) $(obj)/sdl.o: $(src)/sdl.c FORCE $(call if_changed_dep,cc_os.o) + +# eth-raw-os.c is built in the system env, so needs standard includes +# CFLAGS_REMOVE_eth-raw-os.o cannot be used to drop header include path +quiet_cmd_cc_eth-raw-os.o = CC $(quiet_modtag) $@ +cmd_cc_eth-raw-os.o = $(CC) $(filter-out -nostdinc, \ + $(patsubst -I%,-idirafter%,$(c_flags))) -c -o $@ $< + +$(obj)/eth-raw-os.o: $(src)/eth-raw-os.c FORCE + $(call if_changed_dep,cc_eth-raw-os.o) diff --git a/arch/sandbox/cpu/eth-raw-os.c b/arch/sandbox/cpu/eth-raw-os.c new file mode 100644 index 0000000000..601205a60b --- /dev/null +++ b/arch/sandbox/cpu/eth-raw-os.c @@ -0,0 +1,140 @@ +/* + * Copyright (c) 2015 National Instruments + * + * (C) Copyright 2015 + * Joe Hershberger <joe.hershberger@ni.com> + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <asm/eth-raw-os.h> +#include <errno.h> +#include <fcntl.h> +#include <net/if.h> +#include <netinet/in.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <unistd.h> + +#include <linux/if_ether.h> +#include <linux/if_packet.h> + +int sandbox_eth_raw_os_start(const char *ifname, unsigned char *ethmac, + struct eth_sandbox_raw_priv *priv) +{ + struct sockaddr_ll *device; + struct packet_mreq mr; + int ret; + int flags; + + /* Prepare device struct */ + priv->device = malloc(sizeof(struct sockaddr_ll)); + if (priv->device == NULL) + return -ENOMEM; + device = priv->device; + memset(device, 0, sizeof(struct sockaddr_ll)); + device->sll_ifindex = if_nametoindex(ifname); + device->sll_family = AF_PACKET; + memcpy(device->sll_addr, ethmac, 6); + device->sll_halen = htons(6); + + /* Open socket */ + priv->sd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); + if (priv->sd < 0) { + printf("Failed to open socket: %d %s\n", errno, + strerror(errno)); + return -errno; + } + /* Bind to the specified interface */ + ret = setsockopt(priv->sd, SOL_SOCKET, SO_BINDTODEVICE, ifname, + strlen(ifname) + 1); + if (ret < 0) { + printf("Failed to bind to '%s': %d %s\n", ifname, errno, + strerror(errno)); + return -errno; + } + + /* Make the socket non-blocking */ + flags = fcntl(priv->sd, F_GETFL, 0); + fcntl(priv->sd, F_SETFL, flags | O_NONBLOCK); + + /* Enable promiscuous mode to receive responses meant for us */ + mr.mr_ifindex = device->sll_ifindex; + mr.mr_type = PACKET_MR_PROMISC; + ret = setsockopt(priv->sd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, + &mr, sizeof(mr)); + if (ret < 0) { + struct ifreq ifr; + + printf("Failed to set promiscuous mode: %d %s\n" + "Falling back to the old \"flags\" way...\n", + errno, strerror(errno)); + strncpy(ifr.ifr_name, ifname, IFNAMSIZ); + if (ioctl(priv->sd, SIOCGIFFLAGS, &ifr) < 0) { + printf("Failed to read flags: %d %s\n", errno, + strerror(errno)); + return -errno; + } + ifr.ifr_flags |= IFF_PROMISC; + if (ioctl(priv->sd, SIOCSIFFLAGS, &ifr) < 0) { + printf("Failed to write flags: %d %s\n", errno, + strerror(errno)); + return -errno; + } + } + return 0; +} + +int sandbox_eth_raw_os_send(void *packet, int length, + const struct eth_sandbox_raw_priv *priv) +{ + int retval; + + if (!priv->sd || !priv->device) + return -EINVAL; + + retval = sendto(priv->sd, packet, length, 0, + (struct sockaddr *)priv->device, + sizeof(struct sockaddr_ll)); + if (retval < 0) { + printf("Failed to send packet: %d %s\n", errno, + strerror(errno)); + return -errno; + } + return retval; +} + +int sandbox_eth_raw_os_recv(void *packet, int *length, + const struct eth_sandbox_raw_priv *priv) +{ + int retval; + int saddr_size; + + if (!priv->sd || !priv->device) + return -EINVAL; + saddr_size = sizeof(struct sockaddr); + retval = recvfrom(priv->sd, packet, 1536, 0, + (struct sockaddr *)priv->device, + (socklen_t *)&saddr_size); + *length = 0; + if (retval >= 0) { + *length = retval; + return 0; + } + /* The socket is non-blocking, so expect EAGAIN when there is no data */ + if (errno == EAGAIN) + return 0; + return -errno; +} + +void sandbox_eth_raw_os_stop(struct eth_sandbox_raw_priv *priv) +{ + free(priv->device); + priv->device = NULL; + close(priv->sd); + priv->sd = -1; +} diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts index f5e05178e4..553bfbee32 100644 --- a/arch/sandbox/dts/sandbox.dts +++ b/arch/sandbox/dts/sandbox.dts @@ -206,4 +206,10 @@ reg = <0x10002000 0x1000>; fake-host-hwaddr = [00 00 66 44 22 00]; }; + + eth@80000000 { + compatible = "sandbox,eth-raw"; + reg = <0x80000000 0x1000>; + host-raw-interface = "eth0"; + }; }; diff --git a/arch/sandbox/include/asm/eth-raw-os.h b/arch/sandbox/include/asm/eth-raw-os.h new file mode 100644 index 0000000000..df60c4f3b8 --- /dev/null +++ b/arch/sandbox/include/asm/eth-raw-os.h @@ -0,0 +1,32 @@ +/* + * Copyright (c) 2015 National Instruments + * + * (C) Copyright 2015 + * Joe Hershberger <joe.hershberger@ni.com> + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#ifndef __ETH_RAW_OS_H +#define __ETH_RAW_OS_H + +/** + * struct eth_sandbox_raw_priv - raw socket session + * + * sd: socket descriptor - the open socket during a session + * device: struct sockaddr_ll - the host interface packets move to/from + */ +struct eth_sandbox_raw_priv { + int sd; + void *device; +}; + +int sandbox_eth_raw_os_start(const char *ifname, unsigned char *ethmac, + struct eth_sandbox_raw_priv *priv); +int sandbox_eth_raw_os_send(void *packet, int length, + const struct eth_sandbox_raw_priv *priv); +int sandbox_eth_raw_os_recv(void *packet, int *length, + const struct eth_sandbox_raw_priv *priv); +void sandbox_eth_raw_os_stop(struct eth_sandbox_raw_priv *priv); + +#endif /* __ETH_RAW_OS_H */ diff --git a/board/sandbox/README.sandbox b/board/sandbox/README.sandbox index c1f5f7e21f..9f5d3f71d5 100644 --- a/board/sandbox/README.sandbox +++ b/board/sandbox/README.sandbox @@ -190,6 +190,58 @@ Also sandbox uses generic board (CONFIG_SYS_GENERIC_BOARD) and supports driver model (CONFIG_DM) and associated commands. +Linux RAW Networking Bridge +--------------------------- + +The sandbox_eth_raw driver bridges traffic between the bottom of the network +stack and the RAW sockets API in Linux. This allows much of the U-Boot network +functionality to be tested in sandbox against real network traffic. + +For Ethernet network adapters, the bridge utilizes the RAW AF_PACKET API. This +is needed to get access to the lowest level of the network stack in Linux. This +means that all of the Ethernet frame is included. This allows the U-Boot network +stack to be fully used. In other words, nothing about the Linux network stack is +involved in forming the packets that end up on the wire. To receive the +responses to packets sent from U-Boot the network interface has to be set to +promiscuous mode so that the network card won't filter out packets not destined +for its configured (on Linux) MAC address. + +The RAW sockets Ethernet API requires elevated privileges in Linux. You can +either run as root, or you can add the capability needed like so: + +sudo /sbin/setcap "CAP_NET_RAW+ep" /path/to/u-boot + +The default device tree for sandbox includes an entry for eth0 on the sandbox +host machine whose alias is "eth1". The following are a few examples of network +operations being tested on the eth0 interface. + +sudo /path/to/u-boot -D + +DHCP +.... + +set autoload no +set ethact eth1 +dhcp + +PING +.... + +set autoload no +set ethact eth1 +dhcp +ping $gatewayip + +TFTP +.... + +set autoload no +set ethact eth1 +dhcp +set serverip WWW.XXX.YYY.ZZZ +tftpboot u-boot.bin + + SPI Emulation ------------- diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index e46e57bc2e..5bd66ea9d1 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -29,4 +29,14 @@ config ETH_SANDBOX This driver is particularly useful in the test/dm/eth.c tests +config ETH_SANDBOX_RAW + depends on DM_ETH && SANDBOX + default y + bool "Sandbox: Bridge to Linux Raw Sockets" + help + This driver is a bridge from the bottom of the network stack + in U-Boot to the RAW AF_PACKET API in Linux. This allows real + network traffic to be tested from within sandbox. See + board/sandbox/README.sandbox for more details. + endif # NETDEVICES diff --git a/drivers/net/Makefile b/drivers/net/Makefile index b9f5db30bb..2f22151c30 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_PCNET) += pcnet.o obj-$(CONFIG_RTL8139) += rtl8139.o obj-$(CONFIG_RTL8169) += rtl8169.o obj-$(CONFIG_ETH_SANDBOX) += sandbox.o +obj-$(CONFIG_ETH_SANDBOX_RAW) += sandbox-raw.o obj-$(CONFIG_SH_ETHER) += sh_eth.o obj-$(CONFIG_SMC91111) += smc91111.o obj-$(CONFIG_SMC911X) += smc911x.o diff --git a/drivers/net/sandbox-raw.c b/drivers/net/sandbox-raw.c new file mode 100644 index 0000000000..435b8745c3 --- /dev/null +++ b/drivers/net/sandbox-raw.c @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2015 National Instruments + * + * (C) Copyright 2015 + * Joe Hershberger <joe.hershberger@ni.com> + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <asm/eth-raw-os.h> +#include <common.h> +#include <dm.h> +#include <malloc.h> +#include <net.h> + +DECLARE_GLOBAL_DATA_PTR; + + +static int sb_eth_raw_start(struct udevice *dev) +{ + struct eth_sandbox_raw_priv *priv = dev_get_priv(dev); + struct eth_pdata *pdata = dev_get_platdata(dev); + const char *interface; + + debug("eth_sandbox_raw: Start\n"); + + interface = fdt_getprop(gd->fdt_blob, dev->of_offset, + "host-raw-interface", NULL); + if (interface == NULL) + return -EINVAL; + + return sandbox_eth_raw_os_start(interface, pdata->enetaddr, priv); +} + +static int sb_eth_raw_send(struct udevice *dev, void *packet, int length) +{ + struct eth_sandbox_raw_priv *priv = dev_get_priv(dev); + + debug("eth_sandbox_raw: Send packet %d\n", length); + + return sandbox_eth_raw_os_send(packet, length, priv); +} + +static int sb_eth_raw_recv(struct udevice *dev, uchar **packetp) +{ + struct eth_sandbox_raw_priv *priv = dev_get_priv(dev); + int retval; + int length; + + retval = sandbox_eth_raw_os_recv(net_rx_packets[0], &length, priv); + + if (!retval && length) { + debug("eth_sandbox_raw: received packet %d\n", + length); + *packetp = net_rx_packets[0]; + return length; + } + return retval; +} + +static void sb_eth_raw_stop(struct udevice *dev) +{ + struct eth_sandbox_raw_priv *priv = dev_get_priv(dev); + + debug("eth_sandbox_raw: Stop\n"); + + sandbox_eth_raw_os_stop(priv); +} + +static const struct eth_ops sb_eth_raw_ops = { + .start = sb_eth_raw_start, + .send = sb_eth_raw_send, + .recv = sb_eth_raw_recv, + .stop = sb_eth_raw_stop, +}; + +static int sb_eth_raw_ofdata_to_platdata(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_platdata(dev); + + pdata->iobase = dev_get_addr(dev); + return 0; +} + +static const struct udevice_id sb_eth_raw_ids[] = { + { .compatible = "sandbox,eth-raw" }, + { } +}; + +U_BOOT_DRIVER(eth_sandbox_raw) = { + .name = "eth_sandbox_raw", + .id = UCLASS_ETH, + .of_match = sb_eth_raw_ids, + .ofdata_to_platdata = sb_eth_raw_ofdata_to_platdata, + .ops = &sb_eth_raw_ops, + .priv_auto_alloc_size = sizeof(struct eth_sandbox_raw_priv), + .platdata_auto_alloc_size = sizeof(struct eth_pdata), +}; |
