60 static sctp_xmit_t __sctp_packet_append_chunk(struct sctp_packet *packet,
62 static sctp_xmit_t sctp_packet_can_append_data(struct sctp_packet *packet,
64 static void sctp_packet_append_data(struct sctp_packet *packet,
66 static sctp_xmit_t sctp_packet_will_fit(struct sctp_packet *packet,
70 static void sctp_packet_reset(struct sctp_packet *packet)  in sctp_packet_reset()  argument
72 	packet->size = packet->overhead;  in sctp_packet_reset()
73 	packet->has_cookie_echo = 0;  in sctp_packet_reset()
74 	packet->has_sack = 0;  in sctp_packet_reset()
75 	packet->has_data = 0;  in sctp_packet_reset()
76 	packet->has_auth = 0;  in sctp_packet_reset()
77 	packet->ipfragok = 0;  in sctp_packet_reset()
78 	packet->auth = NULL;  in sctp_packet_reset()
84 struct sctp_packet *sctp_packet_config(struct sctp_packet *packet,  in sctp_packet_config()  argument
89 	pr_debug("%s: packet:%p vtag:0x%x\n", __func__, packet, vtag);  in sctp_packet_config()
91 	packet->vtag = vtag;  in sctp_packet_config()
93 	if (ecn_capable && sctp_packet_empty(packet)) {  in sctp_packet_config()
94 		chunk = sctp_get_ecne_prepend(packet->transport->asoc);  in sctp_packet_config()
100 			sctp_packet_append_chunk(packet, chunk);  in sctp_packet_config()
103 	return packet;  in sctp_packet_config()
107 struct sctp_packet *sctp_packet_init(struct sctp_packet *packet,  in sctp_packet_init()  argument
114 	pr_debug("%s: packet:%p transport:%p\n", __func__, packet, transport);  in sctp_packet_init()
116 	packet->transport = transport;  in sctp_packet_init()
117 	packet->source_port = sport;  in sctp_packet_init()
118 	packet->destination_port = dport;  in sctp_packet_init()
119 	INIT_LIST_HEAD(&packet->chunk_list);  in sctp_packet_init()
127 	packet->overhead = overhead;  in sctp_packet_init()
128 	sctp_packet_reset(packet);  in sctp_packet_init()
129 	packet->vtag = 0;  in sctp_packet_init()
131 	return packet;  in sctp_packet_init()
135 void sctp_packet_free(struct sctp_packet *packet)  in sctp_packet_free()  argument
139 	pr_debug("%s: packet:%p\n", __func__, packet);  in sctp_packet_free()
141 	list_for_each_entry_safe(chunk, tmp, &packet->chunk_list, list) {  in sctp_packet_free()
154 sctp_xmit_t sctp_packet_transmit_chunk(struct sctp_packet *packet,  in sctp_packet_transmit_chunk()  argument
161 	pr_debug("%s: packet:%p chunk:%p\n", __func__, packet, chunk);  in sctp_packet_transmit_chunk()
163 	switch ((retval = (sctp_packet_append_chunk(packet, chunk)))) {  in sctp_packet_transmit_chunk()
165 		if (!packet->has_cookie_echo) {  in sctp_packet_transmit_chunk()
166 			error = sctp_packet_transmit(packet);  in sctp_packet_transmit_chunk()
174 				retval = sctp_packet_append_chunk(packet,  in sctp_packet_transmit_chunk()
270 static sctp_xmit_t __sctp_packet_append_chunk(struct sctp_packet *packet,  in __sctp_packet_append_chunk()  argument
277 	retval = sctp_packet_will_fit(packet, chunk, chunk_len);  in __sctp_packet_append_chunk()
285 		sctp_packet_append_data(packet, chunk);  in __sctp_packet_append_chunk()
287 		packet->has_sack = 1;  in __sctp_packet_append_chunk()
289 		packet->has_auth = 1;  in __sctp_packet_append_chunk()
291 		packet->has_data = 1;  in __sctp_packet_append_chunk()
296 		packet->has_cookie_echo = 1;  in __sctp_packet_append_chunk()
300 		packet->has_sack = 1;  in __sctp_packet_append_chunk()
306 		packet->has_auth = 1;  in __sctp_packet_append_chunk()
307 		packet->auth = chunk;  in __sctp_packet_append_chunk()
312 	list_add_tail(&chunk->list, &packet->chunk_list);  in __sctp_packet_append_chunk()
313 	packet->size += chunk_len;  in __sctp_packet_append_chunk()
314 	chunk->transport = packet->transport;  in __sctp_packet_append_chunk()
322 sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *packet,  in sctp_packet_append_chunk()  argument
327 	pr_debug("%s: packet:%p chunk:%p\n", __func__, packet, chunk);  in sctp_packet_append_chunk()
334 		retval = sctp_packet_can_append_data(packet, chunk);  in sctp_packet_append_chunk()
340 	retval = sctp_packet_bundle_auth(packet, chunk);  in sctp_packet_append_chunk()
345 	retval = sctp_packet_bundle_sack(packet, chunk);  in sctp_packet_append_chunk()
349 	retval = __sctp_packet_append_chunk(packet, chunk);  in sctp_packet_append_chunk()
379 int sctp_packet_transmit(struct sctp_packet *packet)  in sctp_packet_transmit()  argument
381 	struct sctp_transport *tp = packet->transport;  in sctp_packet_transmit()
393 	pr_debug("%s: packet:%p\n", __func__, packet);  in sctp_packet_transmit()
396 	if (list_empty(&packet->chunk_list))  in sctp_packet_transmit()
400 	chunk = list_entry(packet->chunk_list.next, struct sctp_chunk, list);  in sctp_packet_transmit()
404 	nskb = alloc_skb(packet->size + MAX_HEADER, GFP_ATOMIC);  in sctp_packet_transmit()
409 	skb_reserve(nskb, packet->overhead + MAX_HEADER);  in sctp_packet_transmit()
430 	sh->source = htons(packet->source_port);  in sctp_packet_transmit()
431 	sh->dest   = htons(packet->destination_port);  in sctp_packet_transmit()
441 	sh->vtag     = htonl(packet->vtag);  in sctp_packet_transmit()
466 	list_for_each_entry_safe(chunk, tmp, &packet->chunk_list, list) {  in sctp_packet_transmit()
492 		if (chunk == packet->auth)  in sctp_packet_transmit()
538 		    (dst_xfrm(dst) != NULL) || packet->ipfragok) {  in sctp_packet_transmit()
594 	nskb->ignore_df = packet->ipfragok;  in sctp_packet_transmit()
598 	sctp_packet_reset(packet);  in sctp_packet_transmit()
619 	list_for_each_entry_safe(chunk, tmp, &packet->chunk_list, list) {  in sctp_packet_transmit()
635 static sctp_xmit_t sctp_packet_can_append_data(struct sctp_packet *packet,  in sctp_packet_can_append_data()  argument
639 	struct sctp_transport *transport = packet->transport;  in sctp_packet_can_append_data()
694 	if (!sctp_packet_empty(packet))  in sctp_packet_can_append_data()
708 	if (chunk->skb->len + q->out_qlen >= transport->pathmtu - packet->overhead)  in sctp_packet_can_append_data()
721 static void sctp_packet_append_data(struct sctp_packet *packet,  in sctp_packet_append_data()  argument
724 	struct sctp_transport *transport = packet->transport;  in sctp_packet_append_data()
749 static sctp_xmit_t sctp_packet_will_fit(struct sctp_packet *packet,  in sctp_packet_will_fit()  argument
758 	psize = packet->size;  in sctp_packet_will_fit()
759 	pmtu  = ((packet->transport->asoc) ?  in sctp_packet_will_fit()
760 		(packet->transport->asoc->pathmtu) :  in sctp_packet_will_fit()
761 		(packet->transport->pathmtu));  in sctp_packet_will_fit()
775 		if (sctp_packet_empty(packet) || !sctp_chunk_is_data(chunk) ||  in sctp_packet_will_fit()
776 		    (!packet->has_data && chunk->auth)) {  in sctp_packet_will_fit()
781 			packet->ipfragok = 1;  in sctp_packet_will_fit()