| /* net/atm/raw.c - Raw AAL0 and AAL5 transports */ |
| |
| /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
| |
| #include <linux/module.h> |
| #include <linux/atmdev.h> |
| #include <linux/capability.h> |
| #include <linux/kernel.h> |
| #include <linux/skbuff.h> |
| #include <linux/mm.h> |
| |
| #include "common.h" |
| #include "protocols.h" |
| |
| /* |
| * SKB == NULL indicates that the link is being closed |
| */ |
| |
| static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb) |
| { |
| if (skb) { |
| struct sock *sk = sk_atm(vcc); |
| |
| skb_queue_tail(&sk->sk_receive_queue, skb); |
| sk->sk_data_ready(sk, skb->len); |
| } |
| } |
| |
| |
| static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb) |
| { |
| struct sock *sk = sk_atm(vcc); |
| |
| pr_debug("(%d) %d -= %d\n", |
| vcc->vci, sk_wmem_alloc_get(sk), skb->truesize); |
| atomic_sub(skb->truesize, &sk->sk_wmem_alloc); |
| dev_kfree_skb_any(skb); |
| sk->sk_write_space(sk); |
| } |
| |
| |
| static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb) |
| { |
| /* |
| * Note that if vpi/vci are _ANY or _UNSPEC the below will |
| * still work |
| */ |
| if (!capable(CAP_NET_ADMIN) && |
| (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) != |
| ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT))) |
| { |
| kfree_skb(skb); |
| return -EADDRNOTAVAIL; |
| } |
| return vcc->dev->ops->send(vcc,skb); |
| } |
| |
| |
| int atm_init_aal0(struct atm_vcc *vcc) |
| { |
| vcc->push = atm_push_raw; |
| vcc->pop = atm_pop_raw; |
| vcc->push_oam = NULL; |
| vcc->send = atm_send_aal0; |
| return 0; |
| } |
| |
| |
| int atm_init_aal34(struct atm_vcc *vcc) |
| { |
| vcc->push = atm_push_raw; |
| vcc->pop = atm_pop_raw; |
| vcc->push_oam = NULL; |
| vcc->send = vcc->dev->ops->send; |
| return 0; |
| } |
| |
| |
| int atm_init_aal5(struct atm_vcc *vcc) |
| { |
| vcc->push = atm_push_raw; |
| vcc->pop = atm_pop_raw; |
| vcc->push_oam = NULL; |
| vcc->send = vcc->dev->ops->send; |
| return 0; |
| } |
| |
| |
| EXPORT_SYMBOL(atm_init_aal5); |