123 строки
2.6 KiB
C
123 строки
2.6 KiB
C
#include "linux/kernel.h"
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#include "linux/stddef.h"
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#include "linux/init.h"
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#include "linux/netdevice.h"
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#include "linux/if_arp.h"
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#include "net_kern.h"
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#include "net_user.h"
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#include "kern.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 = dev->priv;
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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->init = NULL;
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dev->hard_header_len = 0;
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dev->header_cache_update = NULL;
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dev->hard_header_cache = NULL;
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dev->hard_header = 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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}
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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,
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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,
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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)
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{ .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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}
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do {
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if(i>=SLIRP_MAX_ARGS-1) {
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printk("slirp_setup: truncating slirp 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=='_') *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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