net/bridge/br_stp_bpdu.c

81 	unsigned char buf[35];
86 	buf[0] = 0;
87 	buf[1] = 0;
88 	buf[2] = 0;
89 	buf[3] = BPDU_TYPE_CONFIG;
90 	buf[4] = (bpdu->topology_change ? 0x01 : 0) |
92 	buf[5] = bpdu->root.prio[0];
93 	buf[6] = bpdu->root.prio[1];
94 	buf[7] = bpdu->root.addr[0];
95 	buf[8] = bpdu->root.addr[1];
96 	buf[9] = bpdu->root.addr[2];
97 	buf[10] = bpdu->root.addr[3];
98 	buf[11] = bpdu->root.addr[4];
99 	buf[12] = bpdu->root.addr[5];
100 	buf[13] = (bpdu->root_path_cost >> 24) & 0xFF;
101 	buf[14] = (bpdu->root_path_cost >> 16) & 0xFF;
102 	buf[15] = (bpdu->root_path_cost >> 8) & 0xFF;
103 	buf[16] = bpdu->root_path_cost & 0xFF;
104 	buf[17] = bpdu->bridge_id.prio[0];
105 	buf[18] = bpdu->bridge_id.prio[1];
106 	buf[19] = bpdu->bridge_id.addr[0];
107 	buf[20] = bpdu->bridge_id.addr[1];
108 	buf[21] = bpdu->bridge_id.addr[2];
109 	buf[22] = bpdu->bridge_id.addr[3];
110 	buf[23] = bpdu->bridge_id.addr[4];
111 	buf[24] = bpdu->bridge_id.addr[5];
112 	buf[25] = (bpdu->port_id >> 8) & 0xFF;
113 	buf[26] = bpdu->port_id & 0xFF;
115 	br_set_ticks(buf+27, bpdu->message_age);
116 	br_set_ticks(buf+29, bpdu->max_age);
117 	br_set_ticks(buf+31, bpdu->hello_time);
118 	br_set_ticks(buf+33, bpdu->forward_delay);
120 	br_send_bpdu(p, buf, 35);
128 	unsigned char buf[4];
133 	buf[0] = 0;
134 	buf[1] = 0;
135 	buf[2] = 0;
136 	buf[3] = BPDU_TYPE_TCN;
137 	br_send_bpdu(p, buf, 4);
152 	const unsigned char *buf;
158 	buf = skb->data;
159 	if (buf[0] != 0 || buf[1] != 0 || buf[2] != 0)
188 	buf = skb_pull(skb, 3);
190 	if (buf[0] == BPDU_TYPE_CONFIG) {
196 		buf = skb->data;
197 		bpdu.topology_change = (buf[1] & 0x01) ? 1 : 0;
198 		bpdu.topology_change_ack = (buf[1] & 0x80) ? 1 : 0;
200 		bpdu.root.prio[0] = buf[2];
201 		bpdu.root.prio[1] = buf[3];
202 		bpdu.root.addr[0] = buf[4];
203 		bpdu.root.addr[1] = buf[5];
204 		bpdu.root.addr[2] = buf[6];
205 		bpdu.root.addr[3] = buf[7];
206 		bpdu.root.addr[4] = buf[8];
207 		bpdu.root.addr[5] = buf[9];
209 			(buf[10] << 24) |
210 			(buf[11] << 16) |
211 			(buf[12] << 8) |
212 			buf[13];
213 		bpdu.bridge_id.prio[0] = buf[14];
214 		bpdu.bridge_id.prio[1] = buf[15];
215 		bpdu.bridge_id.addr[0] = buf[16];
216 		bpdu.bridge_id.addr[1] = buf[17];
217 		bpdu.bridge_id.addr[2] = buf[18];
218 		bpdu.bridge_id.addr[3] = buf[19];
219 		bpdu.bridge_id.addr[4] = buf[20];
220 		bpdu.bridge_id.addr[5] = buf[21];
221 		bpdu.port_id = (buf[22] << 8) | buf[23];
223 		bpdu.message_age = br_get_ticks(buf+24);
224 		bpdu.max_age = br_get_ticks(buf+26);
225 		bpdu.hello_time = br_get_ticks(buf+28);
226 		bpdu.forward_delay = br_get_ticks(buf+30);
240 	} else if (buf[0] == BPDU_TYPE_TCN) {