Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include "linux/kernel.h" |
| 2 | #include "linux/stddef.h" |
| 3 | #include "linux/init.h" |
| 4 | #include "linux/netdevice.h" |
| 5 | #include "linux/if_arp.h" |
| 6 | #include "net_kern.h" |
| 7 | #include "net_user.h" |
| 8 | #include "kern.h" |
| 9 | #include "slirp.h" |
| 10 | |
| 11 | struct slirp_init { |
| 12 | struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */ |
| 13 | }; |
| 14 | |
| 15 | void slirp_init(struct net_device *dev, void *data) |
| 16 | { |
| 17 | struct uml_net_private *private; |
| 18 | struct slirp_data *spri; |
| 19 | struct slirp_init *init = data; |
| 20 | int i; |
| 21 | |
| 22 | private = dev->priv; |
| 23 | spri = (struct slirp_data *) private->user; |
| 24 | *spri = ((struct slirp_data) |
| 25 | { .argw = init->argw, |
| 26 | .pid = -1, |
| 27 | .slave = -1, |
| 28 | .ibuf = { '\0' }, |
| 29 | .obuf = { '\0' }, |
| 30 | .pos = 0, |
| 31 | .esc = 0, |
| 32 | .dev = dev }); |
| 33 | |
| 34 | dev->init = NULL; |
| 35 | dev->hard_header_len = 0; |
| 36 | dev->header_cache_update = NULL; |
| 37 | dev->hard_header_cache = NULL; |
| 38 | dev->hard_header = NULL; |
| 39 | dev->addr_len = 0; |
| 40 | dev->type = ARPHRD_SLIP; |
| 41 | dev->tx_queue_len = 256; |
| 42 | dev->flags = IFF_NOARP; |
| 43 | printk("SLIRP backend - command line:"); |
| 44 | for(i=0;spri->argw.argv[i]!=NULL;i++) { |
| 45 | printk(" '%s'",spri->argw.argv[i]); |
| 46 | } |
| 47 | printk("\n"); |
| 48 | } |
| 49 | |
| 50 | static unsigned short slirp_protocol(struct sk_buff *skbuff) |
| 51 | { |
| 52 | return(htons(ETH_P_IP)); |
| 53 | } |
| 54 | |
| 55 | static int slirp_read(int fd, struct sk_buff **skb, |
| 56 | struct uml_net_private *lp) |
| 57 | { |
| 58 | return(slirp_user_read(fd, (*skb)->mac.raw, (*skb)->dev->mtu, |
| 59 | (struct slirp_data *) &lp->user)); |
| 60 | } |
| 61 | |
| 62 | static int slirp_write(int fd, struct sk_buff **skb, |
| 63 | struct uml_net_private *lp) |
| 64 | { |
| 65 | return(slirp_user_write(fd, (*skb)->data, (*skb)->len, |
| 66 | (struct slirp_data *) &lp->user)); |
| 67 | } |
| 68 | |
| 69 | struct net_kern_info slirp_kern_info = { |
| 70 | .init = slirp_init, |
| 71 | .protocol = slirp_protocol, |
| 72 | .read = slirp_read, |
| 73 | .write = slirp_write, |
| 74 | }; |
| 75 | |
| 76 | static int slirp_setup(char *str, char **mac_out, void *data) |
| 77 | { |
| 78 | struct slirp_init *init = data; |
| 79 | int i=0; |
| 80 | |
| 81 | *init = ((struct slirp_init) |
| 82 | { argw : { { "slirp", NULL } } }); |
| 83 | |
| 84 | str = split_if_spec(str, mac_out, NULL); |
| 85 | |
| 86 | if(str == NULL) { /* no command line given after MAC addr */ |
| 87 | return(1); |
| 88 | } |
| 89 | |
| 90 | do { |
| 91 | if(i>=SLIRP_MAX_ARGS-1) { |
| 92 | printk("slirp_setup: truncating slirp arguments\n"); |
| 93 | break; |
| 94 | } |
| 95 | init->argw.argv[i++] = str; |
| 96 | while(*str && *str!=',') { |
| 97 | if(*str=='_') *str=' '; |
| 98 | str++; |
| 99 | } |
| 100 | if(*str!=',') |
| 101 | break; |
| 102 | *str++='\0'; |
| 103 | } while(1); |
| 104 | init->argw.argv[i]=NULL; |
| 105 | return(1); |
| 106 | } |
| 107 | |
| 108 | static struct transport slirp_transport = { |
| 109 | .list = LIST_HEAD_INIT(slirp_transport.list), |
| 110 | .name = "slirp", |
| 111 | .setup = slirp_setup, |
| 112 | .user = &slirp_user_info, |
| 113 | .kern = &slirp_kern_info, |
| 114 | .private_size = sizeof(struct slirp_data), |
| 115 | .setup_size = sizeof(struct slirp_init), |
| 116 | }; |
| 117 | |
| 118 | static int register_slirp(void) |
| 119 | { |
| 120 | register_transport(&slirp_transport); |
| 121 | return(1); |
| 122 | } |
| 123 | |
| 124 | __initcall(register_slirp); |
| 125 | |
| 126 | /* |
| 127 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 128 | * Emacs will notice this stuff at the end of the file and automatically |
| 129 | * adjust the settings for this buffer only. This must remain at the end |
| 130 | * of the file. |
| 131 | * --------------------------------------------------------------------------- |
| 132 | * Local variables: |
| 133 | * c-file-style: "linux" |
| 134 | * End: |
| 135 | */ |