34 static int ax25_rx_fragment(ax25_cb *ax25, struct sk_buff *skb)  in ax25_rx_fragment()  argument
39 		if (!(*skb->data & AX25_SEG_FIRST)) {  in ax25_rx_fragment()
40 			if ((ax25->fragno - 1) == (*skb->data & AX25_SEG_REM)) {  in ax25_rx_fragment()
42 				ax25->fragno = *skb->data & AX25_SEG_REM;  in ax25_rx_fragment()
43 				skb_pull(skb, 1);	/* skip fragno */  in ax25_rx_fragment()
44 				ax25->fraglen += skb->len;  in ax25_rx_fragment()
45 				skb_queue_tail(&ax25->frag_queue, skb);  in ax25_rx_fragment()
82 		if (*skb->data & AX25_SEG_FIRST) {  in ax25_rx_fragment()
84 			ax25->fragno = *skb->data & AX25_SEG_REM;  in ax25_rx_fragment()
85 			skb_pull(skb, 1);		/* skip fragno */  in ax25_rx_fragment()
86 			ax25->fraglen = skb->len;  in ax25_rx_fragment()
87 			skb_queue_tail(&ax25->frag_queue, skb);  in ax25_rx_fragment()
99 int ax25_rx_iframe(ax25_cb *ax25, struct sk_buff *skb)  in ax25_rx_iframe()  argument
105 	if (skb == NULL) return 0;  in ax25_rx_iframe()
109 	pid = *skb->data;  in ax25_rx_iframe()
116 		struct sk_buff *skbn = skb_copy(skb, GFP_ATOMIC);  in ax25_rx_iframe()
118 			kfree_skb(skb);  in ax25_rx_iframe()
119 			skb = skbn;  in ax25_rx_iframe()
122 		skb_pull(skb, 1);	/* Remove PID */  in ax25_rx_iframe()
123 		skb->mac_header = skb->network_header;  in ax25_rx_iframe()
124 		skb_reset_network_header(skb);  in ax25_rx_iframe()
125 		skb->dev      = ax25->ax25_dev->dev;  in ax25_rx_iframe()
126 		skb->pkt_type = PACKET_HOST;  in ax25_rx_iframe()
127 		skb->protocol = htons(ETH_P_IP);  in ax25_rx_iframe()
128 		netif_rx(skb);  in ax25_rx_iframe()
132 		skb_pull(skb, 1);	/* Remove PID */  in ax25_rx_iframe()
133 		return ax25_rx_fragment(ax25, skb);  in ax25_rx_iframe()
137 		skb_pull(skb, 1);	/* Remove PID */  in ax25_rx_iframe()
138 		return (*func)(skb, ax25);  in ax25_rx_iframe()
144 			if (sock_queue_rcv_skb(ax25->sk, skb) == 0)  in ax25_rx_iframe()
157 static int ax25_process_rx_frame(ax25_cb *ax25, struct sk_buff *skb, int type, int dama)  in ax25_process_rx_frame()  argument
167 		queued = ax25_std_frame_in(ax25, skb, type);  in ax25_process_rx_frame()
173 			queued = ax25_ds_frame_in(ax25, skb, type);  in ax25_process_rx_frame()
175 			queued = ax25_std_frame_in(ax25, skb, type);  in ax25_process_rx_frame()
183 static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,  in ax25_rcv()  argument
197 	skb_reset_transport_header(skb);  in ax25_rcv()
206 	if (ax25_addr_parse(skb->data, skb->len, &src, &dest, &dp, &type, &dama) == NULL)  in ax25_rcv()
218 	skb_pull(skb, ax25_addr_size(&dp));  in ax25_rcv()
229 	if ((*skb->data & ~0x10) == AX25_UI && dp.lastrepeat + 1 == dp.ndigi) {  in ax25_rcv()
230 		skb_set_transport_header(skb, 2); /* skip control and pid */  in ax25_rcv()
232 		ax25_send_to_raw(&dest, skb, skb->data[1]);  in ax25_rcv()
238 		switch (skb->data[1]) {  in ax25_rcv()
240 			skb_pull(skb,2);		/* drop PID/CTRL */  in ax25_rcv()
241 			skb_reset_transport_header(skb);  in ax25_rcv()
242 			skb_reset_network_header(skb);  in ax25_rcv()
243 			skb->dev      = dev;  in ax25_rcv()
244 			skb->pkt_type = PACKET_HOST;  in ax25_rcv()
245 			skb->protocol = htons(ETH_P_IP);  in ax25_rcv()
246 			netif_rx(skb);  in ax25_rcv()
250 			skb_pull(skb,2);  in ax25_rcv()
251 			skb_reset_transport_header(skb);  in ax25_rcv()
252 			skb_reset_network_header(skb);  in ax25_rcv()
253 			skb->dev      = dev;  in ax25_rcv()
254 			skb->pkt_type = PACKET_HOST;  in ax25_rcv()
255 			skb->protocol = htons(ETH_P_ARP);  in ax25_rcv()
256 			netif_rx(skb);  in ax25_rcv()
265 					kfree_skb(skb);  in ax25_rcv()
270 					skb_pull(skb, 2);  in ax25_rcv()
271 					if (sock_queue_rcv_skb(sk, skb) != 0)  in ax25_rcv()
272 						kfree_skb(skb);  in ax25_rcv()
277 				kfree_skb(skb);  in ax25_rcv()
282 			kfree_skb(skb);	/* Will scan SOCK_AX25 RAW sockets */  in ax25_rcv()
310 		if (ax25_process_rx_frame(ax25, skb, type, dama) == 0)  in ax25_rcv()
311 			kfree_skb(skb);  in ax25_rcv()
321 	if ((*skb->data & ~AX25_PF) != AX25_SABM &&  in ax25_rcv()
322 	    (*skb->data & ~AX25_PF) != AX25_SABME) {  in ax25_rcv()
327 		if ((*skb->data & ~AX25_PF) != AX25_DM && mine)  in ax25_rcv()
346 			kfree_skb(skb);  in ax25_rcv()
354 		skb_set_owner_r(skb, make);  in ax25_rcv()
355 		skb_queue_head(&sk->sk_receive_queue, skb);  in ax25_rcv()
381 		kfree_skb(skb);  in ax25_rcv()
396 	if ((*skb->data & ~AX25_PF) == AX25_SABME) {  in ax25_rcv()
425 		kfree_skb(skb);  in ax25_rcv()
433 int ax25_kiss_rcv(struct sk_buff *skb, struct net_device *dev,  in ax25_kiss_rcv()  argument
436 	skb_orphan(skb);  in ax25_kiss_rcv()
439 		kfree_skb(skb);  in ax25_kiss_rcv()
443 	if ((*skb->data & 0x0F) != 0) {  in ax25_kiss_rcv()
444 		kfree_skb(skb);	/* Not a KISS data frame */  in ax25_kiss_rcv()
448 	skb_pull(skb, AX25_KISS_HEADER_LEN);	/* Remove the KISS byte */  in ax25_kiss_rcv()
450 	return ax25_rcv(skb, dev, (const ax25_address *)dev->dev_addr, ptype);  in ax25_kiss_rcv()