135 static void pppoatm_pop(struct atm_vcc *atmvcc, struct sk_buff *skb)  in pppoatm_pop()  argument
139 	pvcc->old_pop(atmvcc, skb);  in pppoatm_pop()
182 static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb)  in pppoatm_push()  argument
186 	if (skb == NULL) {			/* VCC was closed */  in pppoatm_push()
196 	atm_return(atmvcc, skb->truesize);  in pppoatm_push()
199 		if (skb->len < LLC_LEN ||  in pppoatm_push()
200 		    memcmp(skb->data, pppllc, LLC_LEN))  in pppoatm_push()
202 		skb_pull(skb, LLC_LEN);  in pppoatm_push()
206 			kfree_skb(skb);  in pppoatm_push()
209 		if (skb->len >= sizeof(pppllc) &&  in pppoatm_push()
210 		    !memcmp(skb->data, pppllc, sizeof(pppllc))) {  in pppoatm_push()
212 			skb_pull(skb, LLC_LEN);  in pppoatm_push()
215 		if (skb->len >= (sizeof(pppllc) - LLC_LEN) &&  in pppoatm_push()
216 		    !memcmp(skb->data, &pppllc[LLC_LEN],  in pppoatm_push()
223 			 skb->data[0], skb->data[1], skb->data[2],  in pppoatm_push()
224 			 skb->data[3], skb->data[4], skb->data[5]);  in pppoatm_push()
229 	ppp_input(&pvcc->chan, skb);  in pppoatm_push()
233 	kfree_skb(skb);  in pppoatm_push()
292 static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)  in pppoatm_send()  argument
298 	ATM_SKB(skb)->vcc = pvcc->atmvcc;  in pppoatm_send()
299 	pr_debug("(skb=0x%p, vcc=0x%p)\n", skb, pvcc->atmvcc);  in pppoatm_send()
300 	if (skb->data[0] == '\0' && (pvcc->flags & SC_COMP_PROT))  in pppoatm_send()
301 		(void) skb_pull(skb, 1);  in pppoatm_send()
303 	vcc = ATM_SKB(skb)->vcc;  in pppoatm_send()
318 		kfree_skb(skb);  in pppoatm_send()
324 		if (skb_headroom(skb) < LLC_LEN) {  in pppoatm_send()
326 			n = skb_realloc_headroom(skb, LLC_LEN);  in pppoatm_send()
332 			consume_skb(skb);  in pppoatm_send()
333 			skb = n;  in pppoatm_send()
334 			if (skb == NULL) {  in pppoatm_send()
338 		} else if (!pppoatm_may_send(pvcc, skb->truesize))  in pppoatm_send()
340 		memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN);  in pppoatm_send()
343 		if (!pppoatm_may_send(pvcc, skb->truesize))  in pppoatm_send()
349 		kfree_skb(skb);  in pppoatm_send()
353 	atomic_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc);  in pppoatm_send()
354 	ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options;  in pppoatm_send()
356 		 skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev);  in pppoatm_send()
357 	ret = ATM_SKB(skb)->vcc->send(ATM_SKB(skb)->vcc, skb)  in pppoatm_send()
367 	if ((pvcc->flags & SC_COMP_PROT) && skb_headroom(skb) > 0 &&  in pppoatm_send()
368 	    skb->data[-1] == '\0')  in pppoatm_send()
369 		(void) skb_push(skb, 1);  in pppoatm_send()