projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* net/atm/raw.c - Raw AAL0 and AAL5 transports */ |
| 2 | ||
| 3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
| 4 | ||
| 5 | ||
| 6 | #include <linux/module.h> | |
| 7 | #include <linux/sched.h> | |
| 8 | #include <linux/atmdev.h> | |
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/skbuff.h> | |
| 11 | #include <linux/mm.h> | |
| 12 | ||
| 13 | #include "common.h" | |
| 14 | #include "protocols.h" | |
| 15 | ||
| 16 | ||
| 17 | #if 0 | |
| 18 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
| 19 | #else | |
| 20 | #define DPRINTK(format,args...) | |
| 21 | #endif | |
| 22 | ||
| 23 | ||
| 24 | /* | |
| 25 | * SKB == NULL indicates that the link is being closed | |
| 26 | */ | |
| 27 | ||
| 28 | static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb) | |
| 29 | { | |
| 30 | if (skb) { | |
| 31 | struct sock *sk = sk_atm(vcc); | |
| 32 | ||
| 33 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
| 34 | sk->sk_data_ready(sk, skb->len); | |
| 35 | } | |
| 36 | } | |
| 37 | ||
| 38 | ||
| 39 | static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb) | |
| 40 | { | |
| 41 | struct sock *sk = sk_atm(vcc); | |
| 42 | ||
| 43 | DPRINTK("APopR (%d) %d -= %d\n", vcc->vci, sk->sk_wmem_alloc, | |
| 44 | skb->truesize); | |
| 45 | atomic_sub(skb->truesize, &sk->sk_wmem_alloc); | |
| 46 | dev_kfree_skb_any(skb); | |
| 47 | sk->sk_write_space(sk); | |
| 48 | } | |
| 49 | ||
| 50 | ||
| 51 | static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb) | |
| 52 | { | |
| 53 | /* | |
| 54 | * Note that if vpi/vci are _ANY or _UNSPEC the below will | |
| 55 | * still work | |
| 56 | */ | |
| 57 | if (!capable(CAP_NET_ADMIN) && | |
| 58 | (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) != | |
| 59 | ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT))) | |
| 60 | { | |
| 61 | kfree_skb(skb); | |
| 62 | return -EADDRNOTAVAIL; | |
| 63 | } | |
| 64 | return vcc->dev->ops->send(vcc,skb); | |
| 65 | } | |
| 66 | ||
| 67 | ||
| 68 | int atm_init_aal0(struct atm_vcc *vcc) | |
| 69 | { | |
| 70 | vcc->push = atm_push_raw; | |
| 71 | vcc->pop = atm_pop_raw; | |
| 72 | vcc->push_oam = NULL; | |
| 73 | vcc->send = atm_send_aal0; | |
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | ||
| 78 | int atm_init_aal34(struct atm_vcc *vcc) | |
| 79 | { | |
| 80 | vcc->push = atm_push_raw; | |
| 81 | vcc->pop = atm_pop_raw; | |
| 82 | vcc->push_oam = NULL; | |
| 83 | vcc->send = vcc->dev->ops->send; | |
| 84 | return 0; | |
| 85 | } | |
| 86 | ||
| 87 | ||
| 88 | int atm_init_aal5(struct atm_vcc *vcc) | |
| 89 | { | |
| 90 | vcc->push = atm_push_raw; | |
| 91 | vcc->pop = atm_pop_raw; | |
| 92 | vcc->push_oam = NULL; | |
| 93 | vcc->send = vcc->dev->ops->send; | |
| 94 | return 0; | |
| 95 | } | |
| 96 | ||
| 97 | ||
| 98 | EXPORT_SYMBOL(atm_init_aal5); |