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120 lines
2.6 KiB
120 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
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*/ |
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#include <linux/if_arp.h> |
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#include <linux/init.h> |
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#include <linux/netdevice.h> |
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#include <linux/string.h> |
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#include <net_kern.h> |
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#include <net_user.h> |
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#include "slirp.h" |
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struct slirp_init { |
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struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */ |
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}; |
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void slirp_init(struct net_device *dev, void *data) |
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{ |
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struct uml_net_private *private; |
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struct slirp_data *spri; |
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struct slirp_init *init = data; |
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int i; |
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private = netdev_priv(dev); |
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spri = (struct slirp_data *) private->user; |
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spri->argw = init->argw; |
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spri->pid = -1; |
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spri->slave = -1; |
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spri->dev = dev; |
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slip_proto_init(&spri->slip); |
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dev->hard_header_len = 0; |
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dev->header_ops = NULL; |
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dev->addr_len = 0; |
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dev->type = ARPHRD_SLIP; |
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dev->tx_queue_len = 256; |
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dev->flags = IFF_NOARP; |
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printk("SLIRP backend - command line:"); |
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for (i = 0; spri->argw.argv[i] != NULL; i++) |
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printk(" '%s'",spri->argw.argv[i]); |
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printk("\n"); |
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} |
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static unsigned short slirp_protocol(struct sk_buff *skbuff) |
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{ |
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return htons(ETH_P_IP); |
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} |
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static int slirp_read(int fd, struct sk_buff *skb, struct uml_net_private *lp) |
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{ |
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return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu, |
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(struct slirp_data *) &lp->user); |
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} |
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static int slirp_write(int fd, struct sk_buff *skb, struct uml_net_private *lp) |
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{ |
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return slirp_user_write(fd, skb->data, skb->len, |
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(struct slirp_data *) &lp->user); |
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} |
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const struct net_kern_info slirp_kern_info = { |
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.init = slirp_init, |
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.protocol = slirp_protocol, |
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.read = slirp_read, |
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.write = slirp_write, |
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}; |
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static int slirp_setup(char *str, char **mac_out, void *data) |
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{ |
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struct slirp_init *init = data; |
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int i=0; |
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*init = ((struct slirp_init) { .argw = { { "slirp", NULL } } }); |
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str = split_if_spec(str, mac_out, NULL); |
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if (str == NULL) /* no command line given after MAC addr */ |
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return 1; |
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do { |
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if (i >= SLIRP_MAX_ARGS - 1) { |
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printk(KERN_WARNING "slirp_setup: truncating slirp " |
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"arguments\n"); |
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break; |
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} |
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init->argw.argv[i++] = str; |
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while(*str && *str!=',') { |
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if (*str == '_') |
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*str=' '; |
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str++; |
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} |
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if (*str != ',') |
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break; |
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*str++ = '\0'; |
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} while (1); |
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init->argw.argv[i] = NULL; |
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return 1; |
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} |
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static struct transport slirp_transport = { |
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.list = LIST_HEAD_INIT(slirp_transport.list), |
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.name = "slirp", |
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.setup = slirp_setup, |
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.user = &slirp_user_info, |
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.kern = &slirp_kern_info, |
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.private_size = sizeof(struct slirp_data), |
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.setup_size = sizeof(struct slirp_init), |
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}; |
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static int register_slirp(void) |
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{ |
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register_transport(&slirp_transport); |
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return 0; |
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} |
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late_initcall(register_slirp);
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