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
872 	if (chunk)  in sctp_make_shutdown()
873 		retval->transport = chunk->transport;  in sctp_make_shutdown()
879 					  const struct sctp_chunk *chunk)  in sctp_make_shutdown_ack()  argument
895 	if (retval && chunk)  in sctp_make_shutdown_ack()
896 		retval->transport = chunk->transport;  in sctp_make_shutdown_ack()
903 					const struct sctp_chunk *chunk)  in sctp_make_shutdown_complete()  argument
926 	if (retval && chunk)  in sctp_make_shutdown_complete()
927 		retval->transport = chunk->transport;  in sctp_make_shutdown_complete()
936 				   const struct sctp_chunk *chunk,  in sctp_make_abort()  argument
946 		if (chunk && chunk->chunk_hdr &&  in sctp_make_abort()
947 		    chunk->chunk_hdr->type == SCTP_CID_INIT)  in sctp_make_abort()
965 	if (retval && chunk)  in sctp_make_abort()
966 		retval->transport = chunk->transport;  in sctp_make_abort()
974 					const struct sctp_chunk *chunk,  in sctp_make_abort_no_data()  argument
980 	retval = sctp_make_abort(asoc, chunk,  in sctp_make_abort_no_data()
1000 	if (chunk)  in sctp_make_abort_no_data()
1001 		retval->transport = chunk->transport;  in sctp_make_abort_no_data()
1052 static void *sctp_addto_param(struct sctp_chunk *chunk, int len,  in sctp_addto_param()  argument
1055 	int chunklen = ntohs(chunk->chunk_hdr->length);  in sctp_addto_param()
1058 	target = skb_put(chunk->skb, len);  in sctp_addto_param()
1066 	chunk->chunk_hdr->length = htons(chunklen + len);  in sctp_addto_param()
1067 	chunk->chunk_end = skb_tail_pointer(chunk->skb);  in sctp_addto_param()
1075 					const struct sctp_chunk *chunk,  in sctp_make_abort_violation()  argument
1082 	retval = sctp_make_abort(asoc, chunk, sizeof(struct sctp_errhdr) +  in sctp_make_abort_violation()
1090 	phdr.type = htons(chunk->chunk_hdr->type);  in sctp_make_abort_violation()
1091 	phdr.length = chunk->chunk_hdr->length;  in sctp_make_abort_violation()
1101 					const struct sctp_chunk *chunk,  in sctp_make_violation_paramlen()  argument
1109 	retval = sctp_make_abort(asoc, chunk, payload_len);  in sctp_make_violation_paramlen()
1124 					const struct sctp_chunk *chunk)  in sctp_make_violation_max_retrans()  argument
1130 	retval = sctp_make_abort(asoc, chunk, payload_len);  in sctp_make_violation_max_retrans()
1142 					    const struct sctp_chunk *chunk)  in sctp_make_new_encap_port()  argument
1147 	retval = sctp_make_abort(asoc, chunk,  in sctp_make_new_encap_port()
1153 	nep.cur_port = SCTP_INPUT_CB(chunk->skb)->encap_port;  in sctp_make_new_encap_port()
1154 	nep.new_port = chunk->transport->encap_port;  in sctp_make_new_encap_port()
1195 					   const struct sctp_chunk *chunk,  in sctp_make_heartbeat_ack()  argument
1217 	if (chunk)  in sctp_make_heartbeat_ack()
1218 		retval->transport = chunk->transport;  in sctp_make_heartbeat_ack()
1255 					const struct sctp_chunk *chunk,  in sctp_make_op_error_space()  argument
1274 	if (chunk)  in sctp_make_op_error_space()
1275 		retval->transport = chunk->transport;  in sctp_make_op_error_space()
1290 					const struct sctp_chunk *chunk)  in sctp_make_op_error_limited()  argument
1302 	return sctp_make_op_error_space(asoc, chunk, size);  in sctp_make_op_error_limited()
1307 				      const struct sctp_chunk *chunk,  in sctp_make_op_error()  argument
1313 	retval = sctp_make_op_error_space(asoc, chunk, paylen + reserve_tail);  in sctp_make_op_error()
1398 	SCTP_DBG_OBJCNT_INC(chunk);  in sctp_chunkify()
1406 void sctp_init_addrs(struct sctp_chunk *chunk, union sctp_addr *src,  in sctp_init_addrs()  argument
1409 	memcpy(&chunk->source, src, sizeof(union sctp_addr));  in sctp_init_addrs()
1410 	memcpy(&chunk->dest, dest, sizeof(union sctp_addr));  in sctp_init_addrs()
1414 const union sctp_addr *sctp_source(const struct sctp_chunk *chunk)  in sctp_source()  argument
1417 	if (chunk->transport) {  in sctp_source()
1418 		return &chunk->transport->ipaddr;  in sctp_source()
1421 		return &chunk->source;  in sctp_source()
1488 	struct sctp_chunk *chunk;  in sctp_make_control()  local
1490 	chunk = _sctp_make_chunk(asoc, type, flags, paylen, gfp);  in sctp_make_control()
1491 	if (chunk)  in sctp_make_control()
1492 		sctp_control_set_owner_w(chunk);  in sctp_make_control()
1494 	return chunk;  in sctp_make_control()
1498 static void sctp_chunk_destroy(struct sctp_chunk *chunk)  in sctp_chunk_destroy()  argument
1500 	BUG_ON(!list_empty(&chunk->list));  in sctp_chunk_destroy()
1501 	list_del_init(&chunk->transmitted_list);  in sctp_chunk_destroy()
1503 	consume_skb(chunk->skb);  in sctp_chunk_destroy()
1504 	consume_skb(chunk->auth_chunk);  in sctp_chunk_destroy()
1506 	SCTP_DBG_OBJCNT_DEC(chunk);  in sctp_chunk_destroy()
1507 	kmem_cache_free(sctp_chunk_cachep, chunk);  in sctp_chunk_destroy()
1511 void sctp_chunk_free(struct sctp_chunk *chunk)  in sctp_chunk_free()  argument
1514 	if (chunk->msg)  in sctp_chunk_free()
1515 		sctp_datamsg_put(chunk->msg);  in sctp_chunk_free()
1517 	sctp_chunk_put(chunk);  in sctp_chunk_free()
1536 void *sctp_addto_chunk(struct sctp_chunk *chunk, int len, const void *data)  in sctp_addto_chunk()  argument
1538 	int chunklen = ntohs(chunk->chunk_hdr->length);  in sctp_addto_chunk()
1542 	skb_put_zero(chunk->skb, padlen);  in sctp_addto_chunk()
1543 	target = skb_put_data(chunk->skb, data, len);  in sctp_addto_chunk()
1546 	chunk->chunk_hdr->length = htons(chunklen + padlen + len);  in sctp_addto_chunk()
1547 	chunk->chunk_end = skb_tail_pointer(chunk->skb);  in sctp_addto_chunk()
1556 int sctp_user_addto_chunk(struct sctp_chunk *chunk, int len,  in sctp_user_addto_chunk()  argument
1562 	target = skb_put(chunk->skb, len);  in sctp_user_addto_chunk()
1569 	chunk->chunk_hdr->length =  in sctp_user_addto_chunk()
1570 		htons(ntohs(chunk->chunk_hdr->length) + len);  in sctp_user_addto_chunk()
1571 	chunk->chunk_end = skb_tail_pointer(chunk->skb);  in sctp_user_addto_chunk()
1579 void sctp_chunk_assign_ssn(struct sctp_chunk *chunk)  in sctp_chunk_assign_ssn()  argument
1586 	if (chunk->has_ssn)  in sctp_chunk_assign_ssn()
1590 	sid = ntohs(chunk->subh.data_hdr->stream);  in sctp_chunk_assign_ssn()
1591 	stream = &chunk->asoc->stream;  in sctp_chunk_assign_ssn()
1596 	msg = chunk->msg;  in sctp_chunk_assign_ssn()
1615 void sctp_chunk_assign_tsn(struct sctp_chunk *chunk)  in sctp_chunk_assign_tsn()  argument
1617 	if (!chunk->has_tsn) {  in sctp_chunk_assign_tsn()
1621 		chunk->subh.data_hdr->tsn =  in sctp_chunk_assign_tsn()
1622 			htonl(sctp_association_get_next_tsn(chunk->asoc));  in sctp_chunk_assign_tsn()
1623 		chunk->has_tsn = 1;  in sctp_chunk_assign_tsn()
1629 					     struct sctp_chunk *chunk,  in sctp_make_temp_asoc()  argument
1637 	scope = sctp_scope(sctp_source(chunk));  in sctp_make_temp_asoc()
1642 	skb = chunk->skb;  in sctp_make_temp_asoc()
1743 					struct sctp_chunk *chunk, gfp_t gfp,  in sctp_unpack_cookie()  argument
1749 	struct sk_buff *skb = chunk->skb;  in sctp_unpack_cookie()
1762 	bodysize = ntohs(chunk->chunk_hdr->length) - headersize;  in sctp_unpack_cookie()
1769 	len = ntohs(chunk->chunk_hdr->length);  in sctp_unpack_cookie()
1778 	cookie = chunk->subh.cookie_hdr;  in sctp_unpack_cookie()
1812 	if (ntohl(chunk->sctp_hdr->vtag) != bear_cookie->my_vtag) {  in sctp_unpack_cookie()
1817 	if (chunk->sctp_hdr->source != bear_cookie->peer_addr.v4.sin_port ||  in sctp_unpack_cookie()
1818 	    ntohs(chunk->sctp_hdr->dest) != bear_cookie->my_port) {  in sctp_unpack_cookie()
1848 		*errp = sctp_make_op_error(asoc, chunk,  in sctp_unpack_cookie()
1860 	scope = sctp_scope(sctp_source(chunk));  in sctp_unpack_cookie()
1868 	retval->peer.port = ntohs(chunk->sctp_hdr->source);  in sctp_unpack_cookie()
1881 		sctp_add_bind_addr(&retval->base.bind_addr, &chunk->dest,  in sctp_unpack_cookie()
1882 				   sizeof(chunk->dest), SCTP_ADDR_SRC,  in sctp_unpack_cookie()
1925 				      struct sctp_chunk *chunk,  in sctp_process_missing_param()  argument
1937 		*errp = sctp_make_op_error_space(asoc, chunk, len);  in sctp_process_missing_param()
1953 				      struct sctp_chunk *chunk,  in sctp_process_inv_mandatory()  argument
1959 		*errp = sctp_make_op_error_space(asoc, chunk, 0);  in sctp_process_inv_mandatory()
1970 					const struct sctp_chunk *chunk,  in sctp_process_inv_paramlength()  argument
1980 	*errp = sctp_make_violation_paramlen(asoc, chunk, param);  in sctp_process_inv_paramlength()
1991 				 struct sctp_chunk *chunk,  in sctp_process_hn_param()  argument
2004 	*errp = sctp_make_op_error(asoc, chunk, SCTP_ERROR_DNS_FAILED,  in sctp_process_hn_param()
2112 					struct sctp_chunk *chunk,  in sctp_process_unk_param()  argument
2131 			*errp = sctp_make_op_error_limited(asoc, chunk);  in sctp_process_unk_param()
2167 					  struct sctp_chunk *chunk,  in sctp_verify_param()  argument
2204 						     chunk, err_chunk);  in sctp_verify_param()
2211 		sctp_process_hn_param(asoc, param, chunk, err_chunk);  in sctp_verify_param()
2232 						     chunk, err_chunk);  in sctp_verify_param()
2248 						     chunk, err_chunk);  in sctp_verify_param()
2273 			sctp_process_inv_paramlength(asoc, param.p, chunk,  in sctp_verify_param()
2283 		retval = sctp_process_unk_param(asoc, param, chunk, err_chunk);  in sctp_verify_param()
2293 		     struct sctp_chunk *chunk, struct sctp_chunk **errp)  in sctp_verify_init()  argument
2307 		return sctp_process_inv_mandatory(asoc, chunk, errp);  in sctp_verify_init()
2321 	if (param.v != (void *)chunk->chunk_end)  in sctp_verify_init()
2322 		return sctp_process_inv_paramlength(asoc, param.p, chunk, errp);  in sctp_verify_init()
2329 						  chunk, errp);  in sctp_verify_init()
2334 					   chunk, errp);  in sctp_verify_init()
2355 int sctp_process_init(struct sctp_association *asoc, struct sctp_chunk *chunk,  in sctp_process_init()  argument
2376 	asoc->encap_port = SCTP_INPUT_CB(chunk->skb)->encap_port;  in sctp_process_init()
2380 	if (sctp_cmp_addr_exact(sctp_source(chunk), peer_addr))  in sctp_process_init()
2390 						 chunk->sctp_hdr->source, 0))  in sctp_process_init()
2392 			if (sctp_cmp_addr_exact(sctp_source(chunk), &addr))  in sctp_process_init()
3011 static void sctp_add_asconf_response(struct sctp_chunk *chunk, __be32 crr_id,  in sctp_add_asconf_response()  argument
3037 	sctp_addto_chunk(chunk, sizeof(ack_param), &ack_param);  in sctp_add_asconf_response()
3045 	sctp_addto_chunk(chunk, err_param_len, &err_param);  in sctp_add_asconf_response()
3049 		sctp_addto_chunk(chunk, asconf_param_len, asconf_param);  in sctp_add_asconf_response()
3197 			struct sctp_chunk *chunk, bool addr_param_needed,  in sctp_verify_asconf()  argument
3204 	addip = (struct sctp_addip_chunk *)chunk->chunk_hdr;  in sctp_verify_asconf()
3256 	if (param.v != chunk->chunk_end)  in sctp_verify_asconf()
3872 			struct sctp_chunk *chunk,  in sctp_verify_reconf()  argument
3880 	hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr;  in sctp_verify_reconf()