From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/um/drivers/slip_kern.c | 93 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 arch/um/drivers/slip_kern.c (limited to 'arch/um/drivers/slip_kern.c') diff --git a/arch/um/drivers/slip_kern.c b/arch/um/drivers/slip_kern.c new file mode 100644 index 000000000..c58ccdcc1 --- /dev/null +++ b/arch/um/drivers/slip_kern.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + */ + +#include +#include +#include +#include +#include "slip.h" + +struct slip_init { + char *gate_addr; +}; + +static void slip_init(struct net_device *dev, void *data) +{ + struct uml_net_private *private; + struct slip_data *spri; + struct slip_init *init = data; + + private = netdev_priv(dev); + spri = (struct slip_data *) private->user; + + memset(spri->name, 0, sizeof(spri->name)); + spri->addr = NULL; + spri->gate_addr = init->gate_addr; + spri->slave = -1; + spri->dev = dev; + + slip_proto_init(&spri->slip); + + dev->hard_header_len = 0; + dev->header_ops = NULL; + dev->addr_len = 0; + dev->type = ARPHRD_SLIP; + dev->tx_queue_len = 256; + dev->flags = IFF_NOARP; + printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr); +} + +static unsigned short slip_protocol(struct sk_buff *skbuff) +{ + return htons(ETH_P_IP); +} + +static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp) +{ + return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu, + (struct slip_data *) &lp->user); +} + +static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp) +{ + return slip_user_write(fd, skb->data, skb->len, + (struct slip_data *) &lp->user); +} + +static const struct net_kern_info slip_kern_info = { + .init = slip_init, + .protocol = slip_protocol, + .read = slip_read, + .write = slip_write, +}; + +static int slip_setup(char *str, char **mac_out, void *data) +{ + struct slip_init *init = data; + + *init = ((struct slip_init) { .gate_addr = NULL }); + + if (str[0] != '\0') + init->gate_addr = str; + return 1; +} + +static struct transport slip_transport = { + .list = LIST_HEAD_INIT(slip_transport.list), + .name = "slip", + .setup = slip_setup, + .user = &slip_user_info, + .kern = &slip_kern_info, + .private_size = sizeof(struct slip_data), + .setup_size = sizeof(struct slip_init), +}; + +static int register_slip(void) +{ + register_transport(&slip_transport); + return 0; +} + +late_initcall(register_slip); -- cgit v1.2.3