net/llc/af_llc.c

4  *   Functions in this module are implementation of socket based llc
5  *   communications for the Linux operating system. Support of llc class
31 #include <net/llc.h>
89  *	llc_ui_header_len - return length of llc header based on operation
90  *	@sk: Socket which contains a valid llc socket type.
93  *	Provide the length of the llc header depending on what kind of
95  *	Returns the correct llc header length.
129 	struct llc_sock* llc = llc_sk(sk);
131 	if (unlikely(llc_data_accept_state(llc->state) ||
132 		     llc->remote_busy_flag ||
133 		     llc->p_flag)) {
203 	struct llc_sock *llc;
209 	llc = llc_sk(sk);
211 		llc->laddr.lsap, llc->daddr.lsap);
215 		struct llc_sap *sap = llc->sap;
221 		llc_sap_remove_socket(llc->sap, sk);
227 	netdev_put(llc->dev, &llc->dev_tracker);
279 	struct llc_sock *llc = llc_sk(sk);
302 	llc->laddr.lsap = llc_ui_autoport();
303 	if (!llc->laddr.lsap)
306 	sap = llc_sap_open(llc->laddr.lsap, NULL);
311 	llc->dev = dev;
312 	netdev_tracker_alloc(llc->dev, &llc->dev_tracker, GFP_KERNEL);
315 	memcpy(llc->laddr.mac, llc->dev->dev_addr, IFHWADDRLEN);
316 	memcpy(&llc->addr, addr, sizeof(llc->addr));
332  *	Bind a socket to a specific address. For llc a user is able to bind to
344 	struct llc_sock *llc = llc_sk(sk);
415 	llc->dev = dev;
416 	netdev_tracker_alloc(llc->dev, &llc->dev_tracker, GFP_KERNEL);
419 	llc->laddr.lsap = addr->sllc_sap;
420 	memcpy(llc->laddr.mac, addr->sllc_mac, IFHWADDRLEN);
421 	memcpy(&llc->addr, addr, sizeof(llc->addr));
484 	struct llc_sock *llc = llc_sk(sk);
506 	llc->daddr.lsap = addr->sllc_sap;
507 	memcpy(llc->daddr.mac, addr->sllc_mac, IFHWADDRLEN);
510 	llc->link   = llc_ui_next_link_no(llc->sap->laddr.lsap);
511 	rc = llc_establish_connection(sk, llc->dev->dev_addr,
622 	struct llc_sock *llc = llc_sk(sk);
630 				  (!llc_data_accept_state(llc->state) &&
631 				   !llc->remote_busy_flag &&
632 				   !llc->p_flag), &wait))
674 	struct llc_sock *llc = llc_sk(skb->sk);
676 	if (llc->cmsg_flags & LLC_CMSG_PKTINFO) {
701 	struct llc_sock *llc, *newllc;
733 	llc			= llc_sk(sk);
735 	memcpy(&newllc->addr, &llc->addr, sizeof(newllc->addr));
767 	struct llc_sock *llc = llc_sk(sk);
782 	seq = &llc->copied_seq;
784 		peek_seq = llc->copied_seq;
859 		if ((flags & MSG_PEEK) && peek_seq != llc->copied_seq) {
863 			peek_seq = llc->copied_seq;
935 	struct llc_sock *llc = llc_sk(sk);
944 		llc->laddr.lsap, llc->daddr.lsap);
950 		if (llc_ui_addr_null(&llc->addr))
952 		addr = &llc->addr;
961 	dev = llc->dev;
976 	    llc->dev != dev ||
988 		llc_build_and_send_ui_pkt(llc->sap, skb, addr->sllc_mac,
994 		llc_build_and_send_test_pkt(llc->sap, skb, addr->sllc_mac,
1000 		llc_build_and_send_xid_pkt(llc->sap, skb, addr->sllc_mac,
1014 			__func__, llc->laddr.lsap, llc->daddr.lsap, rc);
1032 	struct llc_sock *llc = llc_sk(sk);
1043 		if(llc->dev)
1044 			sllc.sllc_arphrd = llc->dev->type;
1045 		sllc.sllc_sap = llc->daddr.lsap;
1046 		memcpy(&sllc.sllc_mac, &llc->daddr.mac, IFHWADDRLEN);
1049 		if (!llc->sap)
1051 		sllc.sllc_sap = llc->sap->laddr.lsap;
1053 		if (llc->dev) {
1054 			sllc.sllc_arphrd = llc->dev->type;
1055 			memcpy(&sllc.sllc_mac, llc->dev->dev_addr,
1073  *	get/set info on llc sockets
1095 	struct llc_sock *llc = llc_sk(sk);
1110 		llc->n2 = opt;
1115 		llc->n1 = opt;
1120 		llc->ack_timer.expire = opt * HZ;
1125 		llc->pf_cycle_timer.expire = opt * HZ;
1130 		llc->rej_sent_timer.expire = opt * HZ;
1135 		llc->busy_state_timer.expire = opt * HZ;
1140 		llc->k = opt;
1145 		llc->rw = opt;
1149 			llc->cmsg_flags |= LLC_CMSG_PKTINFO;
1151 			llc->cmsg_flags &= ~LLC_CMSG_PKTINFO;
1177 	struct llc_sock *llc = llc_sk(sk);
1191 		val = llc->n2;					break;
1193 		val = llc->n1;					break;
1195 		val = llc->ack_timer.expire / HZ;		break;
1197 		val = llc->pf_cycle_timer.expire / HZ;		break;
1199 		val = llc->rej_sent_timer.expire / HZ;		break;
1201 		val = llc->busy_state_timer.expire / HZ;	break;
1203 		val = llc->k;				break;
1205 		val = llc->rw;				break;
1207 		val = (llc->cmsg_flags & LLC_CMSG_PKTINFO) != 0;