diff options
Diffstat (limited to 'arch/sandbox')
| -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 |
5 files changed, 191 insertions, 0 deletions
diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig index e7f55fa..52e59d2 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 7d4410c..1b42fee 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 0000000..601205a --- /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 f5e0517..553bfbe 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 0000000..df60c4f --- /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 */ |