^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <net_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <net_user.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "slirp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct slirp_init {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) void slirp_init(struct net_device *dev, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct uml_net_private *private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct slirp_data *spri;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct slirp_init *init = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) private = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) spri = (struct slirp_data *) private->user;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) spri->argw = init->argw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) spri->pid = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) spri->slave = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) spri->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) slip_proto_init(&spri->slip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) dev->hard_header_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) dev->header_ops = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) dev->addr_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) dev->type = ARPHRD_SLIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) dev->tx_queue_len = 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) dev->flags = IFF_NOARP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) printk("SLIRP backend - command line:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) for (i = 0; spri->argw.argv[i] != NULL; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) printk(" '%s'",spri->argw.argv[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) printk("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static unsigned short slirp_protocol(struct sk_buff *skbuff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return htons(ETH_P_IP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int slirp_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) (struct slirp_data *) &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static int slirp_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return slirp_user_write(fd, skb->data, skb->len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) (struct slirp_data *) &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) const struct net_kern_info slirp_kern_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .init = slirp_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .protocol = slirp_protocol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .read = slirp_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .write = slirp_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int slirp_setup(char *str, char **mac_out, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct slirp_init *init = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int i=0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) *init = ((struct slirp_init) { .argw = { { "slirp", NULL } } });
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) str = split_if_spec(str, mac_out, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (str == NULL) /* no command line given after MAC addr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (i >= SLIRP_MAX_ARGS - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) printk(KERN_WARNING "slirp_setup: truncating slirp "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) "arguments\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) init->argw.argv[i++] = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) while(*str && *str!=',') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (*str == '_')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) *str=' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) str++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (*str != ',')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *str++ = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) } while (1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) init->argw.argv[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static struct transport slirp_transport = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .list = LIST_HEAD_INIT(slirp_transport.list),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .name = "slirp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .setup = slirp_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .user = &slirp_user_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .kern = &slirp_kern_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .private_size = sizeof(struct slirp_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .setup_size = sizeof(struct slirp_init),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static int register_slirp(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) register_transport(&slirp_transport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) late_initcall(register_slirp);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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