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net/atm/raw.c
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// SPDX-License-Identifier: GPL-2.0 |
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/* net/atm/raw.c - Raw AAL0 and AAL5 transports */ /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ |
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
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#include <linux/module.h> |
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#include <linux/atmdev.h> |
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#include <linux/capability.h> |
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#include <linux/kernel.h> #include <linux/skbuff.h> #include <linux/mm.h> |
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#include <linux/slab.h> |
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#include "common.h" #include "protocols.h" |
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/* * SKB == NULL indicates that the link is being closed */ |
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static void atm_push_raw(struct atm_vcc *vcc, struct sk_buff *skb) |
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{ if (skb) { struct sock *sk = sk_atm(vcc); skb_queue_tail(&sk->sk_receive_queue, skb); |
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sk->sk_data_ready(sk); |
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} } |
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static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb) |
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{ struct sock *sk = sk_atm(vcc); |
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pr_debug("(%d) %d -= %d ", |
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vcc->vci, sk_wmem_alloc_get(sk), ATM_SKB(skb)->acct_truesize); WARN_ON(refcount_sub_and_test(ATM_SKB(skb)->acct_truesize, &sk->sk_wmem_alloc)); |
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dev_kfree_skb_any(skb); sk->sk_write_space(sk); } |
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static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb) |
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{ /* * Note that if vpi/vci are _ANY or _UNSPEC the below will * still work */ if (!capable(CAP_NET_ADMIN) && |
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(((u32 *)skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) != ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT))) { |
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kfree_skb(skb); return -EADDRNOTAVAIL; |
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} |
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return vcc->dev->ops->send(vcc, skb); |
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} |
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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; } |
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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; } |
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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; } |
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EXPORT_SYMBOL(atm_init_aal5); |