67 static void *sctp_addto_param(struct sctp_chunk *chunk, int len,
73 	struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;  in sctp_control_release_owner()  local
75 	if (chunk->shkey) {  in sctp_control_release_owner()
76 		struct sctp_shared_key *shkey = chunk->shkey;  in sctp_control_release_owner()
77 		struct sctp_association *asoc = chunk->asoc;  in sctp_control_release_owner()
93 		sctp_auth_shkey_release(chunk->shkey);  in sctp_control_release_owner()
97 static void sctp_control_set_owner_w(struct sctp_chunk *chunk)  in sctp_control_set_owner_w()  argument
99 	struct sctp_association *asoc = chunk->asoc;  in sctp_control_set_owner_w()
100 	struct sk_buff *skb = chunk->skb;  in sctp_control_set_owner_w()
109 	if (chunk->auth) {  in sctp_control_set_owner_w()
110 		chunk->shkey = asoc->shkey;  in sctp_control_set_owner_w()
111 		sctp_auth_shkey_hold(chunk->shkey);  in sctp_control_set_owner_w()
114 	skb_shinfo(skb)->destructor_arg = chunk;  in sctp_control_set_owner_w()
119 int sctp_chunk_iif(const struct sctp_chunk *chunk)  in sctp_chunk_iif()  argument
121 	struct sk_buff *skb = chunk->skb;  in sctp_chunk_iif()
143 int sctp_init_cause(struct sctp_chunk *chunk, __be16 cause_code,  in sctp_init_cause()  argument
154 	if (skb_tailroom(chunk->skb) < len)  in sctp_init_cause()
157 	chunk->subh.err_hdr = sctp_addto_chunk(chunk, sizeof(err), &err);  in sctp_init_cause()
380 				      const struct sctp_chunk *chunk,  in sctp_make_init_ack()  argument
411 	cookie = sctp_pack_cookie(asoc->ep, asoc, chunk, &cookie_len,  in sctp_make_init_ack()
485 	if (chunk->transport)  in sctp_make_init_ack()
488 						&chunk->transport->ipaddr);  in sctp_make_init_ack()
568 					 const struct sctp_chunk *chunk)  in sctp_make_cookie_echo()  argument
594 	if (chunk)  in sctp_make_cookie_echo()
595 		retval->transport = chunk->transport;  in sctp_make_cookie_echo()
620 					const struct sctp_chunk *chunk)  in sctp_make_cookie_ack()  argument
635 	if (retval && chunk && chunk->transport)  in sctp_make_cookie_ack()
638 						&chunk->transport->ipaddr);  in sctp_make_cookie_ack()
668 				 const struct sctp_chunk *chunk)  in sctp_make_cwr()  argument
693 	if (chunk)  in sctp_make_cwr()
694 		retval->transport = chunk->transport;  in sctp_make_cwr()
855 				      const struct sctp_chunk *chunk)  in sctp_make_shutdown()  argument
861 	if (chunk && chunk->asoc)  in sctp_make_shutdown()
862 		ctsn = sctp_tsnmap_get_ctsn(&chunk->asoc->peer.tsn_map);  in sctp_make_shutdown()
876 	if (chunk)  in sctp_make_shutdown()
877 		retval->transport = chunk->transport;  in sctp_make_shutdown()
883 					  const struct sctp_chunk *chunk)  in sctp_make_shutdown_ack()  argument
899 	if (retval && chunk)  in sctp_make_shutdown_ack()
900 		retval->transport = chunk->transport;  in sctp_make_shutdown_ack()
907 					const struct sctp_chunk *chunk)  in sctp_make_shutdown_complete()  argument
930 	if (retval && chunk)  in sctp_make_shutdown_complete()
931 		retval->transport = chunk->transport;  in sctp_make_shutdown_complete()
940 				   const struct sctp_chunk *chunk,  in sctp_make_abort()  argument
950 		if (chunk && chunk->chunk_hdr &&  in sctp_make_abort()
951 		    chunk->chunk_hdr->type == SCTP_CID_INIT)  in sctp_make_abort()
969 	if (retval && chunk)  in sctp_make_abort()
970 		retval->transport = chunk->transport;  in sctp_make_abort()
978 					const struct sctp_chunk *chunk,  in sctp_make_abort_no_data()  argument
984 	retval = sctp_make_abort(asoc, chunk,  in sctp_make_abort_no_data()
1004 	if (chunk)  in sctp_make_abort_no_data()
1005 		retval->transport = chunk->transport;  in sctp_make_abort_no_data()
1056 static void *sctp_addto_param(struct sctp_chunk *chunk, int len,  in sctp_addto_param()  argument
1059 	int chunklen = ntohs(chunk->chunk_hdr->length);  in sctp_addto_param()
1062 	target = skb_put(chunk->skb, len);  in sctp_addto_param()
1070 	chunk->chunk_hdr->length = htons(chunklen + len);  in sctp_addto_param()
1071 	chunk->chunk_end = skb_tail_pointer(chunk->skb);  in sctp_addto_param()
1079 					const struct sctp_chunk *chunk,  in sctp_make_abort_violation()  argument
1086 	retval = sctp_make_abort(asoc, chunk, sizeof(struct sctp_errhdr) +  in sctp_make_abort_violation()
1094 	phdr.type = htons(chunk->chunk_hdr->type);  in sctp_make_abort_violation()
1095 	phdr.length = chunk->chunk_hdr->length;  in sctp_make_abort_violation()
1105 					const struct sctp_chunk *chunk,  in sctp_make_violation_paramlen()  argument
1113 	retval = sctp_make_abort(asoc, chunk, payload_len);  in sctp_make_violation_paramlen()
1128 					const struct sctp_chunk *chunk)  in sctp_make_violation_max_retrans()  argument
1134 	retval = sctp_make_abort(asoc, chunk, payload_len);  in sctp_make_violation_max_retrans()
1176 					   const struct sctp_chunk *chunk,  in sctp_make_heartbeat_ack()  argument
1198 	if (chunk)  in sctp_make_heartbeat_ack()
1199 		retval->transport = chunk->transport;  in sctp_make_heartbeat_ack()
1210 					const struct sctp_chunk *chunk,  in sctp_make_op_error_space()  argument
1229 	if (chunk)  in sctp_make_op_error_space()
1230 		retval->transport = chunk->transport;  in sctp_make_op_error_space()
1245 					const struct sctp_chunk *chunk)  in sctp_make_op_error_limited()  argument
1257 	return sctp_make_op_error_space(asoc, chunk, size);  in sctp_make_op_error_limited()
1262 				      const struct sctp_chunk *chunk,  in sctp_make_op_error()  argument
1268 	retval = sctp_make_op_error_space(asoc, chunk, paylen + reserve_tail);  in sctp_make_op_error()
1353 	SCTP_DBG_OBJCNT_INC(chunk);  in sctp_chunkify()
1361 void sctp_init_addrs(struct sctp_chunk *chunk, union sctp_addr *src,  in sctp_init_addrs()  argument
1364 	memcpy(&chunk->source, src, sizeof(union sctp_addr));  in sctp_init_addrs()
1365 	memcpy(&chunk->dest, dest, sizeof(union sctp_addr));  in sctp_init_addrs()
1369 const union sctp_addr *sctp_source(const struct sctp_chunk *chunk)  in sctp_source()  argument
1372 	if (chunk->transport) {  in sctp_source()
1373 		return &chunk->transport->ipaddr;  in sctp_source()
1376 		return &chunk->source;  in sctp_source()
1443 	struct sctp_chunk *chunk;  in sctp_make_control()  local
1445 	chunk = _sctp_make_chunk(asoc, type, flags, paylen, gfp);  in sctp_make_control()
1446 	if (chunk)  in sctp_make_control()
1447 		sctp_control_set_owner_w(chunk);  in sctp_make_control()
1449 	return chunk;  in sctp_make_control()
1453 static void sctp_chunk_destroy(struct sctp_chunk *chunk)  in sctp_chunk_destroy()  argument
1455 	BUG_ON(!list_empty(&chunk->list));  in sctp_chunk_destroy()
1456 	list_del_init(&chunk->transmitted_list);  in sctp_chunk_destroy()
1458 	consume_skb(chunk->skb);  in sctp_chunk_destroy()
1459 	consume_skb(chunk->auth_chunk);  in sctp_chunk_destroy()
1461 	SCTP_DBG_OBJCNT_DEC(chunk);  in sctp_chunk_destroy()
1462 	kmem_cache_free(sctp_chunk_cachep, chunk);  in sctp_chunk_destroy()
1466 void sctp_chunk_free(struct sctp_chunk *chunk)  in sctp_chunk_free()  argument
1469 	if (chunk->msg)  in sctp_chunk_free()
1470 		sctp_datamsg_put(chunk->msg);  in sctp_chunk_free()
1472 	sctp_chunk_put(chunk);  in sctp_chunk_free()
1491 void *sctp_addto_chunk(struct sctp_chunk *chunk, int len, const void *data)  in sctp_addto_chunk()  argument
1493 	int chunklen = ntohs(chunk->chunk_hdr->length);  in sctp_addto_chunk()
1497 	skb_put_zero(chunk->skb, padlen);  in sctp_addto_chunk()
1498 	target = skb_put_data(chunk->skb, data, len);  in sctp_addto_chunk()
1501 	chunk->chunk_hdr->length = htons(chunklen + padlen + len);  in sctp_addto_chunk()
1502 	chunk->chunk_end = skb_tail_pointer(chunk->skb);  in sctp_addto_chunk()
1511 int sctp_user_addto_chunk(struct sctp_chunk *chunk, int len,  in sctp_user_addto_chunk()  argument
1517 	target = skb_put(chunk->skb, len);  in sctp_user_addto_chunk()
1524 	chunk->chunk_hdr->length =  in sctp_user_addto_chunk()
1525 		htons(ntohs(chunk->chunk_hdr->length) + len);  in sctp_user_addto_chunk()
1526 	chunk->chunk_end = skb_tail_pointer(chunk->skb);  in sctp_user_addto_chunk()
1534 void sctp_chunk_assign_ssn(struct sctp_chunk *chunk)  in sctp_chunk_assign_ssn()  argument
1541 	if (chunk->has_ssn)  in sctp_chunk_assign_ssn()
1545 	sid = ntohs(chunk->subh.data_hdr->stream);  in sctp_chunk_assign_ssn()
1546 	stream = &chunk->asoc->stream;  in sctp_chunk_assign_ssn()
1551 	msg = chunk->msg;  in sctp_chunk_assign_ssn()
1570 void sctp_chunk_assign_tsn(struct sctp_chunk *chunk)  in sctp_chunk_assign_tsn()  argument
1572 	if (!chunk->has_tsn) {  in sctp_chunk_assign_tsn()
1576 		chunk->subh.data_hdr->tsn =  in sctp_chunk_assign_tsn()
1577 			htonl(sctp_association_get_next_tsn(chunk->asoc));  in sctp_chunk_assign_tsn()
1578 		chunk->has_tsn = 1;  in sctp_chunk_assign_tsn()
1584 					     struct sctp_chunk *chunk,  in sctp_make_temp_asoc()  argument
1592 	scope = sctp_scope(sctp_source(chunk));  in sctp_make_temp_asoc()
1597 	skb = chunk->skb;  in sctp_make_temp_asoc()
1698 					struct sctp_chunk *chunk, gfp_t gfp,  in sctp_unpack_cookie()  argument
1704 	struct sk_buff *skb = chunk->skb;  in sctp_unpack_cookie()
1717 	bodysize = ntohs(chunk->chunk_hdr->length) - headersize;  in sctp_unpack_cookie()
1724 	len = ntohs(chunk->chunk_hdr->length);  in sctp_unpack_cookie()
1733 	cookie = chunk->subh.cookie_hdr;  in sctp_unpack_cookie()
1767 	if (ntohl(chunk->sctp_hdr->vtag) != bear_cookie->my_vtag) {  in sctp_unpack_cookie()
1772 	if (chunk->sctp_hdr->source != bear_cookie->peer_addr.v4.sin_port ||  in sctp_unpack_cookie()
1773 	    ntohs(chunk->sctp_hdr->dest) != bear_cookie->my_port) {  in sctp_unpack_cookie()
1803 		*errp = sctp_make_op_error(asoc, chunk,  in sctp_unpack_cookie()
1815 	scope = sctp_scope(sctp_source(chunk));  in sctp_unpack_cookie()
1823 	retval->peer.port = ntohs(chunk->sctp_hdr->source);  in sctp_unpack_cookie()
1836 		sctp_add_bind_addr(&retval->base.bind_addr, &chunk->dest,  in sctp_unpack_cookie()
1837 				   sizeof(chunk->dest), SCTP_ADDR_SRC,  in sctp_unpack_cookie()
1880 				      struct sctp_chunk *chunk,  in sctp_process_missing_param()  argument
1892 		*errp = sctp_make_op_error_space(asoc, chunk, len);  in sctp_process_missing_param()
1908 				      struct sctp_chunk *chunk,  in sctp_process_inv_mandatory()  argument
1914 		*errp = sctp_make_op_error_space(asoc, chunk, 0);  in sctp_process_inv_mandatory()
1925 					const struct sctp_chunk *chunk,  in sctp_process_inv_paramlength()  argument
1935 	*errp = sctp_make_violation_paramlen(asoc, chunk, param);  in sctp_process_inv_paramlength()
1946 				 struct sctp_chunk *chunk,  in sctp_process_hn_param()  argument
1959 	*errp = sctp_make_op_error(asoc, chunk, SCTP_ERROR_DNS_FAILED,  in sctp_process_hn_param()
2067 					struct sctp_chunk *chunk,  in sctp_process_unk_param()  argument
2086 			*errp = sctp_make_op_error_limited(asoc, chunk);  in sctp_process_unk_param()
2122 					  struct sctp_chunk *chunk,  in sctp_verify_param()  argument
2159 		sctp_process_hn_param(asoc, param, chunk, err_chunk);  in sctp_verify_param()
2180 						     chunk, err_chunk);  in sctp_verify_param()
2196 						     chunk, err_chunk);  in sctp_verify_param()
2221 			sctp_process_inv_paramlength(asoc, param.p, chunk,  in sctp_verify_param()
2231 		retval = sctp_process_unk_param(asoc, param, chunk, err_chunk);  in sctp_verify_param()
2241 		     struct sctp_chunk *chunk, struct sctp_chunk **errp)  in sctp_verify_init()  argument
2255 		return sctp_process_inv_mandatory(asoc, chunk, errp);  in sctp_verify_init()
2269 	if (param.v != (void *)chunk->chunk_end)  in sctp_verify_init()
2270 		return sctp_process_inv_paramlength(asoc, param.p, chunk, errp);  in sctp_verify_init()
2277 						  chunk, errp);  in sctp_verify_init()
2282 					   chunk, errp);  in sctp_verify_init()
2303 int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk,  in sctp_process_init()  argument
2327 	if (sctp_cmp_addr_exact(sctp_source(chunk), peer_addr))  in sctp_process_init()
2336 					    chunk->sctp_hdr->source, 0);  in sctp_process_init()
2337 			if (sctp_cmp_addr_exact(sctp_source(chunk), &addr))  in sctp_process_init()
2965 static void sctp_add_asconf_response(struct sctp_chunk *chunk, __be32 crr_id,  in sctp_add_asconf_response()  argument
2991 	sctp_addto_chunk(chunk, sizeof(ack_param), &ack_param);  in sctp_add_asconf_response()
2999 	sctp_addto_chunk(chunk, err_param_len, &err_param);  in sctp_add_asconf_response()
3003 		sctp_addto_chunk(chunk, asconf_param_len, asconf_param);  in sctp_add_asconf_response()
3150 			struct sctp_chunk *chunk, bool addr_param_needed,  in sctp_verify_asconf()  argument
3157 	addip = (struct sctp_addip_chunk *)chunk->chunk_hdr;  in sctp_verify_asconf()
3209 	if (param.v != chunk->chunk_end)  in sctp_verify_asconf()
3824 			struct sctp_chunk *chunk,  in sctp_verify_reconf()  argument
3832 	hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr;  in sctp_verify_reconf()