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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/drivers/mcast_kern.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/um/drivers/mcast_kern.c')
-rw-r--r-- | arch/um/drivers/mcast_kern.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/arch/um/drivers/mcast_kern.c b/arch/um/drivers/mcast_kern.c new file mode 100644 index 0000000..faf714e --- /dev/null +++ b/arch/um/drivers/mcast_kern.c @@ -0,0 +1,143 @@ +/* + * user-mode-linux networking multicast transport + * Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org> + * + * based on the existing uml-networking code, which is + * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and + * James Leu (jleu@mindspring.net). + * Copyright (C) 2001 by various other people who didn't put their name here. + * + * Licensed under the GPL. + */ + +#include "linux/kernel.h" +#include "linux/init.h" +#include "linux/netdevice.h" +#include "linux/etherdevice.h" +#include "linux/in.h" +#include "linux/inet.h" +#include "net_kern.h" +#include "net_user.h" +#include "mcast.h" + +struct mcast_init { + char *addr; + int port; + int ttl; +}; + +void mcast_init(struct net_device *dev, void *data) +{ + struct uml_net_private *pri; + struct mcast_data *dpri; + struct mcast_init *init = data; + + pri = dev->priv; + dpri = (struct mcast_data *) pri->user; + dpri->addr = init->addr; + dpri->port = init->port; + dpri->ttl = init->ttl; + dpri->dev = dev; + + printk("mcast backend "); + printk("multicast adddress: %s:%u, TTL:%u ", + dpri->addr, dpri->port, dpri->ttl); + + printk("\n"); +} + +static int mcast_read(int fd, struct sk_buff **skb, struct uml_net_private *lp) +{ + *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER); + if(*skb == NULL) return(-ENOMEM); + return(net_recvfrom(fd, (*skb)->mac.raw, + (*skb)->dev->mtu + ETH_HEADER_OTHER)); +} + +static int mcast_write(int fd, struct sk_buff **skb, + struct uml_net_private *lp) +{ + return mcast_user_write(fd, (*skb)->data, (*skb)->len, + (struct mcast_data *) &lp->user); +} + +static struct net_kern_info mcast_kern_info = { + .init = mcast_init, + .protocol = eth_protocol, + .read = mcast_read, + .write = mcast_write, +}; + +int mcast_setup(char *str, char **mac_out, void *data) +{ + struct mcast_init *init = data; + char *port_str = NULL, *ttl_str = NULL, *remain; + char *last; + int n; + + *init = ((struct mcast_init) + { .addr = "239.192.168.1", + .port = 1102, + .ttl = 1 }); + + remain = split_if_spec(str, mac_out, &init->addr, &port_str, &ttl_str, + NULL); + if(remain != NULL){ + printk(KERN_ERR "mcast_setup - Extra garbage on " + "specification : '%s'\n", remain); + return(0); + } + + if(port_str != NULL){ + n = simple_strtoul(port_str, &last, 10); + if((*last != '\0') || (last == port_str)){ + printk(KERN_ERR "mcast_setup - Bad port : '%s'\n", + port_str); + return(0); + } + init->port = htons(n); + } + + if(ttl_str != NULL){ + init->ttl = simple_strtoul(ttl_str, &last, 10); + if((*last != '\0') || (last == ttl_str)){ + printk(KERN_ERR "mcast_setup - Bad ttl : '%s'\n", + ttl_str); + return(0); + } + } + + printk(KERN_INFO "Configured mcast device: %s:%u-%u\n", init->addr, + init->port, init->ttl); + + return(1); +} + +static struct transport mcast_transport = { + .list = LIST_HEAD_INIT(mcast_transport.list), + .name = "mcast", + .setup = mcast_setup, + .user = &mcast_user_info, + .kern = &mcast_kern_info, + .private_size = sizeof(struct mcast_data), + .setup_size = sizeof(struct mcast_init), +}; + +static int register_mcast(void) +{ + register_transport(&mcast_transport); + return(1); +} + +__initcall(register_mcast); + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ |