net/x25/x25_facilities.c

13  *	mar/20/00	Daniela Squassoni Disabling/enabling of facilities
28  * x25_parse_facilities - Parse facilities from skb into the facilities structs
31  * @facilities: Regular facilities, updated as facilities are found
32  * @dte_facs: ITU DTE facilities, updated as DTE facilities are found
33  * @vc_fac_mask: mask is updated with all facilities found
37  *   0 - Parse OK, this skb has no facilities
38  *  >0 - Parse OK, returns the length of the facilities header
41 int x25_parse_facilities(struct sk_buff *skb, struct x25_facilities *facilities,
50 	 * The kernel knows which facilities were set on an incoming call but
52 	 * give userspace who read incoming call facilities 0 length to indicate
78 					facilities->reverse = p[1] & 0x81;
84 					facilities->reverse = p[1] & 0x01;
90 					facilities->reverse = p[1] & 0x80;
96 					facilities->reverse
103 				facilities->throughput = p[1];
122 				facilities->pacsize_in  = p[1];
123 				facilities->pacsize_out = p[2];
127 				facilities->winsize_in  = p[1];
128 				facilities->winsize_out = p[2];
186  *	Create a set of facilities.
189 		struct x25_facilities *facilities,
197 		 * Length of the facilities field in call_req or
205 	if (facilities->reverse && (facil_mask & X25_MASK_REVERSE)) {
207 		*p++ = facilities->reverse;
210 	if (facilities->throughput && (facil_mask & X25_MASK_THROUGHPUT)) {
212 		*p++ = facilities->throughput;
215 	if ((facilities->pacsize_in || facilities->pacsize_out) &&
218 		*p++ = facilities->pacsize_in ? : facilities->pacsize_out;
219 		*p++ = facilities->pacsize_out ? : facilities->pacsize_in;
222 	if ((facilities->winsize_in || facilities->winsize_out) &&
225 		*p++ = facilities->winsize_in ? : facilities->winsize_out;
226 		*p++ = facilities->winsize_out ? : facilities->winsize_in;
261  *	Try to reach a compromise on a set of facilities.
269 	struct x25_facilities *ours = &x25->facilities;
333  *	Limit values of certain facilities according to the capability of the
336 void x25_limit_facilities(struct x25_facilities *facilities,
341 		if (facilities->winsize_in  > 7) {
343 			facilities->winsize_in = 7;
345 		if (facilities->winsize_out > 7) {
346 			facilities->winsize_out = 7;