diff options
Diffstat (limited to 'net/802/p8022.c')
| -rw-r--r-- | net/802/p8022.c | 54 |
1 files changed, 33 insertions, 21 deletions
diff --git a/net/802/p8022.c b/net/802/p8022.c index f8754e5c0..23e6f2fad 100644 --- a/net/802/p8022.c +++ b/net/802/p8022.c @@ -1,3 +1,22 @@ +/* + * NET3: Support for 802.2 demultiplexing off ethernet (Token ring + * is kept seperate see p8022tr.c) + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Demultiplex 802.2 encoded protocols. We match the entry by the + * SSAP/DSAP pair and then deliver to the registered datalink that + * matches. The control byte is ignored and handling of such items + * is up to the routine passed the frame. + * + * Unlike the 802.3 datalink we have a list of 802.2 entries as there + * are multiple protocols to demux. The list is currently short (3 or + * 4 entries at most). The current demux assumes this. + */ + +#include <linux/config.h> #include <linux/module.h> #include <linux/netdevice.h> #include <linux/skbuff.h> @@ -12,11 +31,11 @@ static struct datalink_proto *p8022_list = NULL; * We don't handle the loopback SAP stuff, the extended * 802.2 command set, multicast SAP identifiers and non UI * frames. We have the absolute minimum needed for IPX, - * IP and Appletalk phase 2. + * IP and Appletalk phase 2. See the llc_* routines for + * support libraries if your protocol needs these. */ - -static struct datalink_proto * -find_8022_client(unsigned char type) + +static struct datalink_proto *find_8022_client(unsigned char type) { struct datalink_proto *proto; @@ -28,14 +47,15 @@ find_8022_client(unsigned char type) return proto; } -int -p8022_rcv(struct sk_buff *skb, struct device *dev, struct packet_type *pt) +int p8022_rcv(struct sk_buff *skb, struct device *dev, struct packet_type *pt) { struct datalink_proto *proto; proto = find_8022_client(*(skb->h.raw)); - if (proto != NULL) { + if (proto != NULL) + { skb->h.raw += 3; + skb->nh.raw += 3; skb_pull(skb,3); return proto->rcvfunc(skb, dev, pt); } @@ -45,8 +65,7 @@ p8022_rcv(struct sk_buff *skb, struct device *dev, struct packet_type *pt) return 0; } -static void -p8022_datalink_header(struct datalink_proto *dl, +static void p8022_datalink_header(struct datalink_proto *dl, struct sk_buff *skb, unsigned char *dest_node) { struct device *dev = skb->dev; @@ -59,7 +78,7 @@ p8022_datalink_header(struct datalink_proto *dl, dev->hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len); } -static struct packet_type p8022_packet_type = +static struct packet_type p8022_packet_type = { 0, /* MUTTER ntohs(ETH_P_8022),*/ NULL, /* All devices */ @@ -68,23 +87,16 @@ static struct packet_type p8022_packet_type = NULL, }; -static struct symbol_table p8022_proto_syms = { -#include <linux/symtab_begin.h> - X(register_8022_client), - X(unregister_8022_client), -#include <linux/symtab_end.h> -}; - +EXPORT_SYMBOL(register_8022_client); +EXPORT_SYMBOL(unregister_8022_client); void p8022_proto_init(struct net_proto *pro) { p8022_packet_type.type=htons(ETH_P_802_2); dev_add_pack(&p8022_packet_type); - register_symtab(&p8022_proto_syms); } - -struct datalink_proto * -register_8022_client(unsigned char type, int (*rcvfunc)(struct sk_buff *, struct device *, struct packet_type *)) + +struct datalink_proto *register_8022_client(unsigned char type, int (*rcvfunc)(struct sk_buff *, struct device *, struct packet_type *)) { struct datalink_proto *proto; |