104  *	information for the different frame formats.
107 		struct lapb_frame *frame)  in lapb_decode()  argument
109 	frame->type = LAPB_ILLEGAL;  in lapb_decode()
122 				frame->cr = LAPB_COMMAND;  in lapb_decode()
124 				frame->cr = LAPB_RESPONSE;  in lapb_decode()
127 				frame->cr = LAPB_COMMAND;  in lapb_decode()
129 				frame->cr = LAPB_RESPONSE;  in lapb_decode()
134 				frame->cr = LAPB_COMMAND;  in lapb_decode()
136 				frame->cr = LAPB_RESPONSE;  in lapb_decode()
139 				frame->cr = LAPB_COMMAND;  in lapb_decode()
141 				frame->cr = LAPB_RESPONSE;  in lapb_decode()
152 			 * I frame - carries NR/NS/PF  in lapb_decode()
154 			frame->type       = LAPB_I;  in lapb_decode()
155 			frame->ns         = (skb->data[0] >> 1) & 0x7F;  in lapb_decode()
156 			frame->nr         = (skb->data[1] >> 1) & 0x7F;  in lapb_decode()
157 			frame->pf         = skb->data[1] & LAPB_EPF;  in lapb_decode()
158 			frame->control[0] = skb->data[0];  in lapb_decode()
159 			frame->control[1] = skb->data[1];  in lapb_decode()
165 			 * S frame - take out PF/NR  in lapb_decode()
167 			frame->type       = skb->data[0] & 0x0F;  in lapb_decode()
168 			frame->nr         = (skb->data[1] >> 1) & 0x7F;  in lapb_decode()
169 			frame->pf         = skb->data[1] & LAPB_EPF;  in lapb_decode()
170 			frame->control[0] = skb->data[0];  in lapb_decode()
171 			frame->control[1] = skb->data[1];  in lapb_decode()
175 			 * U frame - take out PF  in lapb_decode()
177 			frame->type       = skb->data[0] & ~LAPB_SPF;  in lapb_decode()
178 			frame->pf         = skb->data[0] & LAPB_SPF;  in lapb_decode()
179 			frame->control[0] = skb->data[0];  in lapb_decode()
180 			frame->control[1] = 0x00;  in lapb_decode()
186 			 * I frame - carries NR/NS/PF  in lapb_decode()
188 			frame->type = LAPB_I;  in lapb_decode()
189 			frame->ns   = (skb->data[0] >> 1) & 0x07;  in lapb_decode()
190 			frame->nr   = (skb->data[0] >> 5) & 0x07;  in lapb_decode()
191 			frame->pf   = skb->data[0] & LAPB_SPF;  in lapb_decode()
194 			 * S frame - take out PF/NR  in lapb_decode()
196 			frame->type = skb->data[0] & 0x0F;  in lapb_decode()
197 			frame->nr   = (skb->data[0] >> 5) & 0x07;  in lapb_decode()
198 			frame->pf   = skb->data[0] & LAPB_SPF;  in lapb_decode()
201 			 * U frame - take out PF  in lapb_decode()
203 			frame->type = skb->data[0] & ~LAPB_SPF;  in lapb_decode()
204 			frame->pf   = skb->data[0] & LAPB_SPF;  in lapb_decode()
207 		frame->control[0] = skb->data[0];  in lapb_decode()